A show cave you ride rather than walk. Of the 1,050 m visitor route at the Coves de Sant Josep, 800 m are covered sitting in a flat-bottomed punt that two boatmen push along with a long wooden pole – no engine, no paddles, at a steady 20 °C. Only 250 m are on foot, through the Galería Seca, and only when the water level allows it. The river is the longest navigable underground river in Spain; the European record you will read everywhere is a marketing line, and the world record belongs somewhere else entirely. Prices here are the operator's 2026 euro rates, converted to US dollars at a dated reference rate.
- TicketsSlots are released gradually and the operator names no fixed advance-booking window.
- Price€18 (about $20.63) – Adult, boat trip with commentary
- OpenThere is no published annual timetable.
- Best timeA weekday outside the Spanish school holidays, in the first slot of the day: fewer boats are moving at once and the boatmen have time to talk.
- ClaustrophobiaThe operator advises against the visit for anyone with claustrophobia, agoraphobia or severe lung disease.
Tickets and prices
Slots are released gradually and the operator names no fixed advance-booking window. For weekends, Spanish public-holiday bridges and the summer holidays, book several days ahead; turn up on spec and you will usually find only leftovers.
Official prices
- Adult, boat trip with commentary€18 (about $20.63)
- Children 3 to 12€12 ($13.75)
- Children 0 to 2, on a lap unless a seat is freefree
- Concession: over 65, students, Carnet Jove, adults with a disability, official tourist guides€14 ($16.04)
- Large or single-parent families, adults€14 ($16.04)
- Large or single-parent families, children 3 to 12€10 ($11.46)
- Minors with a disability€10 ($11.46)
- Espeleokayak, about 2 hours, wetsuit and helmet included€60 (about $68.76)
- "Origen" experience, about 3 hours, small group€100 (about $114.60)
- Day trip from Valencia including transfer, admission and guide (Visit València)€69 adults ($79.07) / €35 children ($40.11)
- Car park at the site, including a campervan areafree
- Conversion€1 = $1.1460, the European Central Bank reference rate of 18 September 2026; dollar figures rounded to the cent
As of 09/2026 · source and direct booking: covesdesantjosep.es
When everything is sold out
The online allocation per slot is small. On 20 September 2026 seven of twelve slots in the official shop had only one to four seats left. When nothing is available online, the operator's FAQ says simply that the online allocation is exhausted.
Tickets and day trips from Valencia
The operator charges €18 (about $20.63) and no reseller beats that, so the thing to buy here is the journey, not the admission. It earns its keep in two situations. The online allocation per time slot is small - on 20 September 2026 seven of twelve slots had one to four seats left - and the cave guarantees nothing at the ticket desk, so a packaged trip can be the only seat available for your date. And La Vall d'Uixó is awkward without a car: no railway station, a coach to the town centre and then 2.5 km, against a four-hour excursion from Valencia at around €69 (about $79) with transfer, admission and guide in one. Check the description for the departure point and whether cave admission is actually included, and remember that the commentary in the boat is in Spanish and Valencian whatever language the tour is sold in.
From Valencia: Caves of San José Tour with Boat & Guide
From Valencia: Caves of San José Tour + Guide & Entry ticket
From Valencia: Cueva de Sant Josep + Entry Ticket + Valencian Gift
From Valencia: San José Caves Guided Tour with Transport
Show all 12 offers
From Valencia: Montanejos Thermal Spring & San Jose Cave
Valencia: San José Caves with a boat ride on an underground river and a small group
Valencia: San José Caves Tour & Summer Waterfall Day Trip
From Valencia to the Caves of San José | Exclusive transportation for up to 4 people
Valencia: San José Caves Tour + Peñiscola or Vilafamés
Private San José Caves Experience & Local Brunch
Cruise through the longest cave in Europe (Las Cuevas de Sant Josep)
Valencia: Port Saplaya, Salto de la Novia & Coves sant josep
Booked through GetYourGuide (affiliate link, advertising). Most offers can be cancelled free of charge up to 24 hours ahead. Prices as of 20 September 2026.
Opening hours and best time
There is no published annual timetable. The operator's own fares page says instead: for current times, please call 964 69 05 76 – the slots are adjusted by season and by water level and released only on the booking platform. The phone line is answered from 9.20am to 5pm, which is not the same thing as opening hours, although English pages regularly print it as such. In practice boats leave every 20 minutes; on 20 September 2026 the official shop had slots from 10am to 3.40pm. Older figures still circulating ("10am–3.40pm on weekdays, 9.20am–5pm at weekends", "9.45am–3.30pm", "10am to 5pm all year") are not reliable. On top of that the cave can close at short notice after heavy rain – most recently documented in September 2024, when more than 100 litres of rain per square metre closed first the Galería Seca and then the whole site. The Espeleokayak and the "Origen" experience normally run at 6pm from spring to autumn.
When it is quietest
A weekday outside the Spanish school holidays, in the first slot of the day: fewer boats are moving at once and the boatmen have time to talk. Because it is 20 °C down there all year, the visit is at its best in high summer – 35 °C outside, shirtsleeve weather in the punt. The other side of that: after long spells of rain, above all in the autumn DANA season, the river rises. First the walk through the Galería Seca is dropped, and in the worst case the cave closes altogether. If you are coming in October or November, check the operator's channels before you drive out.
Who it suits
With children
Explicitly a family outing – the water is calm and you stay seated throughout. Children under 13 must be accompanied by an adult. Under-2s travel on a lap unless a seat happens to be free.
Minimum age
None for the boat trip. The Espeleokayak is recommended from age 8 (in a double kayak with an adult) and the "Origen" experience from 12. Both kayak options carry a weight recommendation of up to 110 kg and you must be able to swim.
Wheelchair
The operator describes the approaches as adapted and the trip as suitable for visitors with reduced mobility, but asks you to e-mail your needs in advance. Two things to weigh up: it is a ten-minute walk from the car park to the cave, and getting in and out of the boat is the real obstacle.
Pushchair
The operator says nothing about pushchairs. Large rucksacks and bags are not allowed inside and there is no left-luggage or locker service, so a pushchair would have to stay at the boarding point.
Dogs
No pets inside the cave. The operator suggests splitting the group and buying tickets at least an hour apart so somebody can stay with the animal. For guide and assistance dogs, write in advance.
Claustrophobia
The operator advises against the visit for anyone with claustrophobia, agoraphobia or severe lung disease. At the former siphons – the Boca del Forn and the Galería dels Sifons – the passage was blasted open and is low; you duck right down in the boat. There is no getting out along the way.
What to wear
Comfortable clothes that do not get in the way when boarding, and closed non-slip shoes – bare feet, swimwear or a bare chest will not get you in. At 20 °C (68 °F) and high humidity you will not be cold, but you sit still for 40 minutes just above the water: a thin jacket or jumper is welcome. The floor of the Galería Seca is made up, but wet in places from dripping water.
Photography
This is the point English pages most often get backwards: cameras and phones may not be used during the visit, only where staff expressly release them. Visitor accounts describe photography being allowed on the way back, but not on the outward leg or in the Galería Seca. A souvenir photo is taken at the boarding point and can be bought afterwards.
Getting there
By public transport
La Vall d'Uixó has no railway station. The nearest Cercanías stops are Nules-la Vilavella, Xilxes and Moncofa, and from there it is a taxi or a local bus. The intercity coach is more direct: services run from Valencia to the centre of La Vall d'Uixó in roughly one to one and a half hours for about €5 (about $5.73). From the bus station in the centre it is still about 2.5 km to the Paraje de Sant Josep – on foot, by local bus or by taxi. Without a car and without Spanish, the organised day trip is usually the easier answer.
By car
A large car park, completely free, with its own campervan area. From the car park to the cave entrance is another ten minutes on foot – build that into your slot, because you have to be at the ticket desk ten minutes before the time you booked. English pages that describe the car park as being right next to the ticket booth are understating the walk.
From the nearest city
Valencia Airport (VLC) is the arrival point for most international visitors and sits about 45 to 50 minutes away by car; Castellón Airport (CDT) is a similar distance. From the city of Valencia it is around 50 km on the A-7 or AP-7, 35 to 45 minutes depending on the source; from Castelló de la Plana about 30 km and 30 minutes. Valencia, not Barcelona, is the base: every documented excursion starts in Valencia, Castellón, Peñíscola or Oropesa. Visit València sells a four-hour trip leaving daily at 8.15am from the Torres de Serranos, with transfer, admission, guide and a visit to the Iberian settlement above the cave, at €69 for adults (about $79.07) and €35 for children ($40.11).
Tips for your visit
- Book online rather than hoping for the desk. The operator states on its own booking page that it does not guarantee sales at the ticket office, and it takes no reservations by phone or e-mail.
- Be at the desk ten minutes before your slot, and add the ten-minute walk from the car park. Miss the boat and the ticket is gone, with no refund.
- Bring a camera but keep it in your bag. Photography is allowed only where staff release it – in practice on the way back. The rest of the time, just look.
- Leave big luggage in the car. Rucksacks and larger bags are not allowed inside and there are no lockers.
- Take a thin jacket. 20 °C (68 °F) sounds mild, but you sit motionless for 40 minutes just above the water.
- Duck when the boatmen tell you to. The blasted siphons at the Boca del Forn and the Galería dels Sifons have very low ceilings, and your hands have to stay inside the boat for the whole trip.
- In wet weather, check the operator's channels first. The walk through the Galería Seca goes first; if the river keeps rising the whole cave closes.
- Plan half a day rather than 40 minutes. The Paraje de Sant Josep around the cave has picnic and barbecue areas, a playground, cafés, walking and mountain-bike trails, and the Iberian settlement above the cave is open to visitors.
- Want more than the standard ride? The Espeleokayak (€60 / about $68.76, from age 8, wetsuit and helmet included) and "Origen" (€100 / about $114.60, from age 12, twelve people maximum) usually run at 6pm and need at least six bookings to go ahead.
What the internet gets wrong
The word that keeps falling out is "navigable". Spain's geological survey, the IGME, records this in its data sheet for geosite IB221 as the karst system with the longest navigable river in Spain, over 2 km, which is "advertised as the longest navigable underground river in Europe" – an advertising claim, in the IGME's own words. The operator is more careful than its resellers and writes only "one of the longest navigable underground rivers in Europe". Nothing here is a world record: the longest surveyed underground river is the Sistema Sac Actun in Mexico, measured in tens of kilometres, and the longest navigable one open to tourists is generally given as the Puerto Princesa subterranean river in the Philippines. What you actually ride is 800 m.
None of that belongs to the standard trip. The helmet, wetsuit, neoprene socks, paddle and insurance are the kit for the Espeleokayak, a separate €60 (about $68.76) activity that normally runs at 6pm. On the punt you sit in your own clothes, keep your hands inside the boat and duck when told.
The house rules forbid the use of cameras and mobile phones during the visit, and allow them only where staff expressly release them. Holland America's own excursion note gets it right where the blogs do not: "Photography or video is not permitted in the caves." Visitor accounts agree that the return leg is released and the outward leg and the Galería Seca are not.
All out of date. In September 2026 the operator charges €18 (about $20.63) for adults, €12 ($13.75) for children aged 3 to 12 and €14 ($16.04) concession. The bands go by age, not height, only under-3s are free, and the operator may ask for proof of age.
on 20 September 2026, seven of twelve slots in the official shop had between one and four seats left.
The river decides. The operator prints the 250 m walk through the Galería Seca with the caveat that it happens only if conditions allow, because seeping water makes the path impassable; if the river keeps rising, the whole site shuts. That happened in September 2024 after more than 100 litres of rain per square metre, and again weeks earlier after a DANA storm. Holland America's small print is the honest version: the visit "is contingent upon suitable water levels".
The operator's own figures are 1,050 m in total – 800 m on the water, out and back together, and 250 m on foot – in about 40 minutes. You do not walk back; the boat returns you to the boarding point.
There is no audio guide at all, in any language. Two boatmen per punt do the talking, in Spanish and Valencian. English exists only on the organised day trips from Valencia, which the operator does not run.
The operator publishes no annual timetable and says on its own fares page to phone 964 69 05 76 for current times. The 9.20am to 5pm that English pages print as opening hours is the phone line. Boats leave every 20 minutes and the slots move with the season and the water level; on 20 September 2026 the official shop offered 10am to 3.40pm.
A punt takes up to 14 passengers plus two boatmen, and if you want it to yourself you pay for all 14 seats. Parking is free and large, but it is a ten-minute walk from there to the cave – which matters, because you must be at the desk ten minutes before your slot.
The caves are not a UNESCO site. What is documented is Spanish protection – Bien de Interés Cultural and historic-artistic monument since 2000. Whether the two painted panels at the boarding point fall under the serial World Heritage listing for rock art of the Mediterranean Basin could not be established, and the provincial tourist board itself calls their chronology indeterminate. Either way, no ticket is needed to see them and they are not what you are paying for.
History in brief
- The cave has been known for some 17,000 years. Paintings and rock engravings were found at the entrance, the first of them in 1993; the operator assigns them to the Magdalenian. The provincial tourist board of Castellón describes two rock panels beside the walkway to the boarding point, with red schematic signs including a meander that may represent the river.
- Above the cave lies an Iberian settlement from the 6th century BC. From Roman times comes a funerary slab for Caius Gnaeus Crassus, son of the consul Marcus Licinius Crassus.
- The naturalist Antoni Josep Cavanilles described the spring at the foot of the Sant Josep hill in his "Observaciones" on the Kingdom of Valencia at the end of the 18th century.
- The first documented exploration was made on 3 September 1897 by the engineer José Gimeno Lassala, commissioned by the town, with a boatman from the Almenara marshes. He got 443 m in, past the Boca del Forn, and did not find where the water comes from. Nobody has since.
- In 1928 the 19-year-old Herminio Arroyas Martínez died exploring the Galería dels Sifons. During the Spanish Civil War the cave served as an air-raid shelter and a field hospital.
- A flood in 1956 tore out all the wooden walkways and the wiring. The town then decided to convert the cave for boats: a weir holds the water level steady and the narrow siphons were blasted open. The first 380 m opened on 17 July 1960; more blasting in 1961 added the Blue Lake and the present route, and the Galería Seca followed in 1973.
- Success came quickly: over 4,000 visitors in the summer of 1961, more than 40,000 the year after, 92,735 in 1963, over 120,000 in 1964 and 285,000 in 1974.
- Exploration continues. In 1975 the surveyed length was 2,384 m; campaigns between 2016 and 2023 took cave divers past three kilometres. In 2020 a ceramic urn was found beside the boarding point, provisionally dated to the Bronze Age.
- In 2018/19 the German firm Cave Lighting of Herborn converted the whole installation to LED: 715 fittings inside and 20 outside, about 3,780 watts and 300,000 lumens, plus the light and music sequence in the bat chamber. It has been running since April 2019.
Frequent questions
How much does it cost to visit the Caves of Sant Josep in 2026?
€18 for adults (about $20.63) and €12 ($13.75) for children aged 3 to 12; under-3s are free. The concession rate of €14 ($16.04) covers over-65s, students, Carnet Jove holders, adults with a disability and official tourist guides, and large or single-parent families pay €14 for adults and €10 for children. The price is identical online and at the desk. Dollar figures use the ECB reference rate of 18 September 2026.
Do I need to book Coves de Sant Josep tickets in advance?
In practice, yes. The operator states on its own booking page that it does not guarantee sales at the ticket desk, and the online allocation per time slot is small – on 20 September 2026 seven of twelve slots had only one to four seats left. There are no reservations by phone, e-mail or WhatsApp. If you turn up without a ticket, be there when it opens, and accept that on a busy day that may not be enough.
How long does the Caves of Sant Josep boat trip take?
About 40 minutes for the 1,050 m route: 800 m by boat, there and back, and 250 m on foot through the Galería Seca. English pages quoting 45 or 55 minutes are rounding up someone else's number. Add the ten-minute walk from the car park and the requirement to be at the desk ten minutes before your slot, and the visit itself takes a little over an hour.
Is this really the longest underground river in the world?
No, and it is not Europe's either, in the strict sense. Spain's geological survey, the IGME, records the system as having the longest navigable river in Spain and being "advertised as" the longest navigable underground river in Europe. The operator itself says only "one of the longest". The longest underground river on record is the Sistema Sac Actun in Mexico, tens of kilometres long, and the longest navigable one open to tourists is usually given as Puerto Princesa in the Philippines. Over three kilometres of this cave have been surveyed; 800 m of it carry visitors.
Can you take photos inside the Caves of Sant Josep?
Only where the staff release it. The house rules ban the use of cameras and phones during the visit, and visitors report that photography is allowed on the way back but not on the outward leg or in the dry gallery. English blogs that tell you photography is allowed as long as you turn the flash off are wrong; Holland America's excursion note, which says photography and video are not permitted, is closer to the truth. A souvenir photo is taken at the boarding point and sold afterwards.
Do you have to wear a helmet, and do you get wet?
No helmet on the boat trip, and no life jacket either – both belong to the Espeleokayak, which is a separate €60 (about $68.76) activity. You do have to duck: the former siphons at the Boca del Forn and the Galería dels Sifons were blasted open in the 1950s and 1960s to let the boats through, and the ceiling is very low. The boatmen warn you in time. You stay dry apart from drips from the ceiling, and your hands must stay inside the boat throughout.
Is it open all year?
Not reliably. There is no published annual timetable at all – the operator tells you to phone for current times, and the slots move with the season and the water level. After heavy rain the 250 m walk through the Galería Seca is dropped first, and if the underground river keeps rising the whole cave closes, as it did in September 2024 after more than 100 litres of rain per square metre. Autumn, the DANA season, is when this happens; check the operator's channels before you set off.
Is it worth visiting?
If you have already done a few stalactite caves, this is something else: 800 m in an engineless punt that two boatmen push along with a pole through flooded passages, some of them low enough that you put your head on your knees. There is almost nothing else like it in Europe. The formations are less spectacular than at Nerja or on Mallorca, the experience more peculiar – and at €18 (about $20.63) and 40 minutes it is easy to plan around. As a day out it works best combined with the park around it.
Can you visit without a guided tour?
No. The only way in is the boat, and the boat comes with two boatmen who punt and commentate – there is no self-guided route and no audio guide in any language. The commentary is in Spanish and Valencian. English comes only with the organised day trips from Valencia, which are run by tour operators, not by the cave.
How many people are in each boat?
Up to 14. Staff try to keep families and groups of friends together. If you want the boat to yourself you can book it exclusively, but you pay for all 14 seats. English pages that say ten per boat are guessing.
How do I get to the Caves of Sant Josep from Valencia?
By car it is about 50 km on the A-7 or AP-7, 35 to 45 minutes; parking is free, and it is a ten-minute walk from the car park to the entrance. Valencia Airport is 45 to 50 minutes away. Without a car: La Vall d'Uixó has no station, the nearest Cercanías stops are Nules-la Vilavella, Xilxes and Moncofa, and you finish by taxi or local bus. The intercity coach is more direct – about an hour to an hour and a half to the town centre for roughly €5 (about $5.73) – but the bus station is still 2.5 km from the cave.
Can you do the Caves of Sant Josep as a day trip from Barcelona?
Valencia is the base, not Barcelona. Every organised excursion that could be documented departs from Valencia, Castellón, Peñíscola or Oropesa; none was found leaving from Barcelona, which is in a different region several hours up the coast. If you are staying in Barcelona, treat this as part of a Valencia trip rather than a day out.
Are there day trips from Valencia with an English guide?
Yes. Visit València sells a four-hour excursion leaving daily at 8.15am from the Torres de Serranos, including return transfer, admission, the boat trip with an official guide and a visit to the Iberian settlement above the cave. It costs €69 for adults (about $79.07) and €35 for children ($40.11), and runs in Spanish and English daily, with Italian on Mondays, Wednesdays and Fridays. Similar trips leave from Castellón, Peñíscola and Oropesa.
Is it suitable for children?
Yes – the operator markets it as a family outing. You sit for the whole ride, the water is calm and there is no minimum age. Children under 13 need an adult with them. Anyone who dislikes the dark or tight spaces will struggle, because you cannot get out part way through, and the operator advises against the visit for people with claustrophobia, agoraphobia or severe lung disease.
Can you kayak the underground river instead?
Yes, on the Espeleokayak, €60 (about $68.76) a person: about two hours, the same 800 m in a single or double kayak plus the 250 m on foot, with wetsuit, neoprene socks, helmet, paddle and insurance included, and showers and changing rooms on site. Recommended from age 8 with an adult, and you must be able to swim. There are 16 places per session, it needs six bookings to go ahead, and from spring to autumn it usually starts at 6pm. The step up from it is "Origen": three hours, €100 (about $114.60), from age 12, twelve people maximum.
How cold is it inside, and what should I wear?
A constant 20 °C (68 °F) all year, with high humidity; the water is 18 to 20 °C according to the lighting firm that worked in the river for months. You will not be cold, but you sit still for 40 minutes just above the water, so a thin jacket or jumper helps. Closed non-slip shoes are compulsory – bare feet, swimwear or a bare chest will not be admitted – and the floor of the dry gallery is wet in places.
Sources
Show 41 sources – every figure on this page is sourced
- covesdesantjosep.es/ – Operator's wording "one of the longest navigable underground rivers in Europe", FAQ on reservations, clothing, 20 °C, chambers, contact, address, phone line 9.20am–5pm
- covesdesantjosep.es/les-coves/ – 1,050 m total route, 800 m by boat, 250 m on foot "if conditions allow", 40 minutes, 20 °C, house rules (camera and phone ban, hands inside the boat, no luggage, no animals), BIC status
- covesdesantjosep.es/tarifas-y-horarios/ – All 2026 prices (€18/12/14/10, Espeleokayak €60, Origen €100), proof required for concessions, groups from 20, no exchange or refund, the note to phone for current times, 6pm starts for the kayak tours
- covesdesantjosep.es/preguntas-frecuentes/ – 40-minute duration, 20 °C, clothing and footwear rules, photography rule, no minimum age but under-13s accompanied, maximum 14 per boat, private boat, online allocation exhausted, same price online and at the desk, free parking with campervan area
- covesdesantjosep.es/normativa/ – Full visitor regulations: luggage, no touching, hands inside the boat, camera and phone ban, food and drink, pets
- covesdesantjosep.es/historia/ – 17,000 years of use, the Cavanilles description, the 1897 exploration by Gimeno Lassala, Civil War field hospital, the 1956 flood, opening on 17 July 1960 with 380 m, visitor numbers 1961–1974, survey campaigns 1971–2023, urn find 2020
- covesdesantjosep.es/espeleokayak-2/ – Espeleokayak: 2 hours, 16 places per session, from age 8, 110 kg recommendation, equipment included down to the helmet and wetsuit, meeting point 30 minutes before
- covesdesantjosep.es/contacto/ – Getting there: 50 km from Valencia on the A-7/A-3, coaches from Valencia and Castellón to the town centre, nearest stations Nules-Vilavella, Xilxes, Moncofa, airports 45–50 minutes away
- covesdesantjosep.sacatuentrada.es/es/entradas/visita-coves-de-s… – Official ticket shop: the warning that sales at the desk are not guaranteed, the ten-minute walk from the car park, no telephone reservations, slots on 20 September 2026 from 10am to 3.40pm every 20 minutes with remaining seats
- www.cuevasturisticas.es/rio-subterraneo-de-san-jose – ACTE, the Spanish show-cave association: 2,750 m total length, 800 m by boat, 250 m dry gallery, 20 °C all year, Triassic dolomites, chronology 1902/1926/1936/1958/1961, Galería Seca from 1973
- info.igme.es/ielig/LIGInfo.aspx?codigo=IB221 – IGME geosite IB221: "advertised as the longest navigable underground river in Europe (2,348 m, of which about 800 m navigable)", longest navigable river in Spain, Muschelkalk, swallow holes at Alfondeguilla, 150,000 visitors a year, UTM coordinates, access roads
- www.cuevascastellon.uji.es/ES6D01.php?id=3692 – Speleological catalogue of the Universitat Jaume I: 3,005 m surveyed, depth −4 m, Sala de les Rates Penades 35×10×8 m, Boca del Forn and Galería dels Sifons as blasted siphons, 255 m dry gallery, gallery heights 2–8 m, exploration history from 1897, the 1928 fatality
- es.wikipedia.org/wiki/Grutas_de_San_Jos%C3%A9 – 2,750 m current route, 20 °C, Lago Diana 5 m deep, 60 m tunnel in the siphon gallery, the Cathedral with its 12 m vault, exploration 1902/1954/1960/1961, Magdalenian finds
- turismolavallduixo.com/en/san-jose-4/ – Municipal tourist office in English: over 3 km explored, origin of the river unknown, the boat pushed by hand with a wooden pole and no engine, 40 minutes, 20 °C, limited capacity
- www.comunitatvalenciana.com/es/mediterraneo-en-accion/coves-de-… – Regional tourist portal: 45 minutes, Sala de los Murciélagos, Lago de Diana 5 m deep, Lago Azul, siphon galleries, the "Singin' in the Cave" event
- castellonplaza.com/coves-sant-josep-vall-uixo-baten-record-visi… – Record of 237,000 visitors in 2023, up 27 per cent on the previous year, operator Emsevall
- www.elperiodic.com/lavall/coves-sant-josep-baten-record-visitan… – Summer 2025: 113,109 boat passengers from 1 June to 15 September (+10 per cent on 103,718), Espeleokayak 1,826 participants (+51 per cent), 22,497 photographs sold
- www.elperiodic.com/lavall/cierran-temporalmente-subterraneo-cov… – Closure in September 2024: over 100 l/m² of rain, first the Galería Seca and then the whole cave closed, preceded by a DANA storm
- www.cavelighting.de/coves-de-sant-josep-project-2018-2019.html – German lighting contractor: water temperature 18–20 °C, repeated flooding during the works, 610 + 105 fittings inside and 20 outside, about 3,780 W, 300,000 lumens, commissioned April 2019
- www.visitvalencia.com/en/events-valencia/san-jose-caves-excursi… – Day trip from Valencia 2026 in English: €69 adults / €35 children, daily at 8.15am from the Torres de Serranos, 4 hours, Spanish and English daily plus Italian on Mondays, Wednesdays and Fridays, Iberian settlement included
- www.turismodecastellon.com/de/que-hacer/cultura/patrimonios-hum… – Provincial tourist board: historic-artistic monument since 2000, description of the two rock panels at the boarding point, "schematic style", chronology indeterminate
- www.fundacionaquae.org/wiki/el-rio-subterraneo-navegable-de-las… – Exploration history: Boca del Forn 1902, Lago de Diana 1926, weir and boat system from 1950, blasting in 1961, 2,348 m after the 1971–1975 campaigns
- www.rome2rio.com/s/Valencia-Spain/Coves-de-Sant-Josep – Journey planner Valencia–Coves de Sant Josep: coach about €5 and a good hour and a half, Cercanías as far as Xilxes, drive of about 48 km
- www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml – ECB reference rate of 18 September 2026: €1 = $1.1460, the basis for every dollar figure on this page
- inspain.news/the-longest-underground-river-in-europe-is-located… – English claim "the longest underground river in Spain but also in all of Europe" and outdated prices "general admission €14, reduced €10, children up to 13 years old €8"; article dated 16 January 2024
- www.civitatis.com/en/valencia/caves-day-trip/ – Day trip listing with "a boat trip on Europe's longest underground river", "850 meters by boat", "200 metres on foot" and a "55-minute cruise", from €69
- veronikasadventure.com/from-valencia-san-jose-caves-navigate-th… – Claim "Guides provide helmets, flashlights, and life vests for the underground river boat ride", plus "Europe's longest underground river", "Europe's longest navigable cave" and a "45-minute boat ride"
- theabroadguide.com/from-valencia-san-jose-caves-guided-tour-wit… – Claims "Photography is allowed inside the caves, but visitors are advised to use flash-free settings" and "life jackets are provided for the boat ride"; tour priced at $70.99
- www.livetheworld.com/activities/spain/saint-josephs-caves-coves… – Claims "prices … starting from 8€ per person", "all seasons", and the recommendation to bring a camera "to capture the stunning beauty"; address given as C/ Constitución in the town centre
- en.actualidadviajes.com/caves-of-san-jose/ – Claims "adults €10, children (4-13) €5, seniors/large families €7", winter hours "10 AM–2 PM with hourly departures", a boat journey "covering roughly 2 kilometers", 45 minutes, and "audio guides … in six languages (English, Spanish, German, French, Italian, Russian)"
- www.servigroup.com/en/blog/caves-san-jose/ – Claims "declared a World Heritage Site by UNESCO", tickets "from 6 euros", "normal hours being from 10am to 5pm throughout the year when the enclosure is only open on weekends and public holidays", 45 minutes and 255 m on foot
- www.adventurefix.co/p/coves-de-sant-josep – Claim that the caves "can be visited year-round", with advice to avoid June to August
- www.cbsage.com/valencias-underground-river-san-jose-caves/ – Claims "standard adult tickets are around €10–€15", "small boats holding approximately 10 people", and "ample parking right next to the tourist office and ticket booth"
- airial.travel/attractions/spain/la-vall-duix%C3%B3/caves-of-san… – AI-generated travel guide claiming hours of "9:20 AM–7:00 PM", "approximately €10–€15 per adult", a constant "66°F (19°C)", and water "1-2 meters deep" with sections "around 11 meters"
- fairytaletraveller.com/coves-de-sant-josep-europes-longest-navi… – Claims tickets are "available online and at the main entrance" and a duration of "45-50 minutes"; correct on photography being released only on the way back
- bonterraresort.com/en/blog/exploring-the-underground-wonders-le… – Claim "declared a Site of Cultural Interest and World Heritage by UNESCO"; correct on 40 minutes, 800 m by boat and 250 m on foot
- www.kimkim.com/e/caves-of-san-jose-day-trip – Day-trip listing repeating the UNESCO claim and giving the river as "nearly 2 miles (3,000 m)"
- www.hollandamerica.com/en/us/cruise-destinations/mediterranean-… – Cruise-line shore excursion, the rare English listing that gets the rules right: "Photography or video is not permitted in the caves" and "the visit to the caves is contingent upon suitable water levels"; from $119
- www.spain.info/en/places-of-interest/san-jose-underground-river/ – Spanish national tourist board in English: "one of the few navigable underground rivers in Spain", 2,750 m of which 800 m visitable, 40 minutes, no UNESCO claim
- www.cuevasturisticas.es/cueva-del-canelobre – Nearby site Cuevas del Canelobre at Busot: 70 m vault, 45 m access tunnel, aircraft workshop in the Civil War
- mucc.castello.es/es/sedes/refugio-antiaereo/ – Nearby site, the Plaza Tetuán air-raid shelter in Castelló: 1937/38, free entry, maximum 60 people, audio guide in four languages