10 caves · down to 135 m · 1 suitable for an intro team
Cave diving in Northern Spain
- Caves10
- Max depth135 m
- Water temperature7–13 °C
- Dive centres4
Now in Northern Spain (Burgos, Soria, Cantabria)
Diving and fills
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Fills nearby
- Fill stationCentro Buceo PedreñaAir, nitrox and mixed gas; the team includes a trimix gas blenderRoute ↗
- Fill stationBuceo Mundo SubmarinoAir, nitrox, trimix and helium in any mix, up to 300 bar (O₂ and He analysers)Route ↗
- Fill stationMourosubAir, nitrox, trimix (helium and oxygen in stock); argon. Pressure (200/300 bar): askRoute ↗
Why come here
Northern Spain is exploration country: cold karst springs in Burgos, the deep Fuentona in Soria and the sumps of the Matienzo karst in Cantabria. From Covanera you dive the Pozo Azul, one of Spain's longest underwater caves, in water that stays at 9–11 °C all year. Every cave here calls for full cave, and many dives go deep and far, with trimix and long cold decompression. The springs react strongly to rain and snowmelt, and each province has its own rules: cave diving in La Fuentona is tightly restricted, in Cantabria you often need authorisation and must notify 112 before entering a cave, and in Burgos you check beforehand whether a permit is needed. Facilities are scarce: the nearest confirmed trimix fills are in Cantabria, about 1.5 h from Covanera.
Don't miss
- Pozo Azul: through S1 to La Burbuja, a 300 m air-filled canal where S2 begins, in a spring where trout live.
- Fuente Aguanaz: the outlet of the Matienzo karst, with water traced from sinks about 6 km away that ends up as Santander's drinking water.
- Cueva del Molino (Bustablado): the explorers call S1 an inviting dive from a shingle pool, and S3 is clear and full of fossils.
On a rest day
- Orbaneja del Castillo: The village where the water from the Cueva del Agua tumbles down between the houses as a waterfall.
- Burgos Cathedral: Burgos's Gothic cathedral, a UNESCO World Heritage Site.
- Ermita de San Bernabé (Ojo Guareña): A chapel built inside the cave, the part of the Ojo Guareña cave system that is open to visitors.
All 10 caves
1 closed not shown ·
| Site | Max depth | Type | Certification |
|---|---|---|---|
| A Buraca das ChoiasSmall cylinders / no-mount · Full cave | – | Small cylinders / no-mount | Full cave |
| Cueva del Agua (Orbaneja del Castillo)Permission neededSidemount · Full cave | 12 m | Sidemount | Full cave |
| Cueva del Molino (Bustablado)Permission neededSidemount · Full cave | 93 m | Sidemount | Full cave |
| Fuente AguanazSmall cylinders / no-mount · Full cave | 7 m | Small cylinders / no-mount | Full cave |
| Fuente AzulNot known yet · Full cave | 135 m | Not known yet | Full cave |
| La FuentonaPermission neededBackmount · Full cave | 115 m | Backmount | Full cave |
| Pozo AzulPermission neededBackmount · Intro to cave (first section) | 72 m | Backmount | Intro to cave (first section) |
| Pozo La TorcaSidemount · Full cave | 30 m | Sidemount | Full cave |
| Pozo San VicenteSidemount · Full cave | 70 m | Sidemount | Full cave |
Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training.
Map
Dive centres and fill stations
4 dive centres, fill stations and instructors
Dive centre
Centro Buceo Pedreña
Barrio La Barquería 151E, 39130 Pedreña
- Air, nitrox and mixed gas
- Sidemount · PADI
- Recreational gear and scooters
Dive centre
Buceo Mundo Submarino
C/ Dr. Federico de la Lastra 3, bajo, 39770 Laredo (Cantabria)
- Air, nitrox, trimix and helium in any mix, up to 300 bar
- SSI
- 10/12/15/18 l cylinders and 2×10 and 2×12 l twinsets
Fill station
Mourosub
Bajos Edificio Capitanía, Avda. de la Tornada s/n, 39600 Maliaño (Cantabria)
- Air, nitrox, trimix
Dive centre
Nemodivers (Colindres)
Puerto de Colindres, local 27, 39750 Colindres
- Air, nitrox and trimix
- Sidemount
- The school's rental gear
Order: partners first, clearly marked as partner; then dive centres by distance from Covanera (Pozo Azul) and independent instructors by name. Not a recommendation: check what they offer yourself.
On this list, or should you be? Get a free partner card →Where to stay
Find a place near Covanera, Burgos, Muriel de la Fuente, Soria, Matienzo, Espinosa de los Monteros, Folgoso do Courel
Villages that work well as a base for the caves in this region. Find a place for your team:
- CovaneraBooking.com ↗
- BurgosBooking.com ↗
- Muriel de la FuenteBooking.com ↗
- SoriaBooking.com ↗
- MatienzoBooking.com ↗
- Espinosa de los MonterosBooking.com ↗
- Folgoso do CourelBooking.com ↗
The links to Booking.com are affiliate links: if you book through one, DiveTripPlanner earns a small commission. You pay the same.
Practical info: rules, fills and emergency numbers
Emergencies
- 112. Hyperbaric chamber: Hospital Universitario Marqués de Valdecilla, Av. Marqués de Valdecilla 25, 39010 Santander — multiplace chamber in a hospital unit with 24-hour service, tel. +34 942 20 25 70 (~1 h 15 from Covanera). In 2016 this chamber was out of order for months (petition) — 112 decides where you go. From Soria also: Hospital Central de la Defensa Gómez Ulla, Glorieta del Ejército 1, 28047 Madrid, multiplace, 24 h, +34 914 22 20 00. DAN Europe +39 06 4211 5685.
- Emergencies in Galicia: 112. Reference hyperbaric chamber for Galicia and part of northern Spain: the hyperbaric unit of the Hospital Naval de Ferrol (multiplace for 14 people, 24 h with on-call cover) — let 112 arrange the referral.
Access and rules
- Burgos: Pozo Azul, Pozo San Vicente, Orbaneja and Pozo La Torca lie in municipalities of the Parque Natural Hoces del Alto Ebro y Rudrón (Ley 15/2008). Turismo Burgos says only certified, experienced cave divers may enter the Pozo Azul galleries; a permit system was announced in 2008 — check with the Junta de Castilla y León (environment department) before the trip.
- Soria: La Fuentona is a Monumento Natural; swimming is banned and cave diving is 'very restricted' — contact the Sección de Espacios Naturales in Soria first. Car park P2 is regulated and paid at busy times.
- Cantabria: entering caves needs authorisation from the regional Consejería de Universidades, Igualdad, Cultura y Deporte unless the cave is on the exempt list (resolutions of 2020 and 2025). Apply at least a month ahead, two months for July and August. Every participant must be a member of a caving federation (in Spain a regional one, for foreigners their national one), and you first send the application to the Federación Cántabra de Espeleología for its report. Always notify 112 before entering a cave (Ley de Cantabria 2/2017). The Matienzo Caves Project coordinates diving in its area and welcomes divers who get in touch (matienzocaves.org.uk).
Closed or restricted
- Ojo Guareña (Merindad de Sotoscueva, Burgos): Monumento Natural (Decreto 61/1996), Bien de Interés Cultural (1991) and Natura 2000. Only the Cueva/Ermita de San Bernabé is open to the public, plus guided speleotourism in the Cueva Palomera; the rest of the system is off limits. Diving campaigns only with a permit from the Junta de Castilla y León (Delegación Territorial de Burgos, environment and culture services). Casa del Parque (visitor centre) in Quintanilla del Rebollar.
Gas and fills
- Gas: no public trimix fill station found in Burgos or Soria province; the nearest confirmed trimix fills are in Cantabria (Maliaño near Santander, Laredo), ~1.5 h from Covanera. Plan your gas in advance.
Water and season
- Water: Pozo Azul 9–11 °C year-round, Fuente Azul 13 °C. Springs react strongly to rain and snowmelt (flooding at Pozo Azul in May 2008, strong winter outflow at La Fuentona, swollen streams at Matienzo at Easter 2013).
Getting around
- Covanera: free car park in the village, ~300 m (5–10 min) to the Pozo Azul; Bar Muñecas near the pool is the expeditions' usual staging post. Few services in the village (no cash machine or supermarket).
- Galicia — A Buraca das Choias (Folgoso do Courel, Lugo) lies in the Montañas do Courel Geopark; water ~7 °C. Contact the Concello de Folgoso do Courel and the exploring clubs (Geoceanic, GEB) in advance. ~4.5–5 h drive from Covanera (estimate).
News
News articles that mention one of the caves in this region, collected automatically and not checked by us.
- The 2026 InDepth State of Cave Exploration ↗
- This is underground Castilla y León: visitable caves beyond Ojo Guareña ↗
- The karst complex of Burgos declared Natural Monument: Ojo Guareña, cave houses in the mountains ↗
- Xesús Manteca, cave diver: 'The Pozo Azul will give work to several generations of speleologists' ↗
Access and rules change: check what applies locally right before your trip. Source: GDELT Project and the news feeds of diving magazines.
Searched automatically, last on 13 Nov 2026.
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