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Northern Spain · about 38 km from Burgos

Fuente Azul

  • Max depth135 m
  • CertificationFull cave
  • Water temperature≈ ~13 °Cestimated, no reports yet
  • SpecialExperienced divers
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What it looks like

All 1 videos and posts

Videos and posts

From other divers, via YouTube, Instagram and Facebook. They only load when you click; after that, Google's or Meta's privacy rules apply.

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Other people's footage, not advice: how someone else dives here says nothing about what suits your team. Dive within your training.

The dive

A deep spring in the Arlanza area, SE of Burgos, with water at 13 °C (1999). This is an exploration dive, not a standard visitor dive. Martín Burgui set Spanish sump depth records here: -120 m (2002) and -135 m (2006).

1 earlier accident or incident has been reported at this cave. Read what happened ↓

Profile and sections

A deep spring in the Arlanza area, SE of Burgos, with water at 13 °C (1999). This is an exploration dive, not a standard visitor dive.

Martín Burgui set Spanish sump depth records here: -120 m (2002) and -135 m (2006). John Volanthen explored the rising passages in 2008.

Practical: check with G.E. Edelweiss (Burgos) beforehand.

Depth and profile
Vertical shaft to -135 m (2006) · rising side branch to -80 m (2008) and -43 m (2011) · ~580 m in total (another list: 490 m)
Configuration
Deep trimix dive; CCR is the obvious choice
DPV: Not DPV-suitable (estimate)
Vertical shaft
Who can dive where
  • CaveAt least Full cave
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR
  • Whole caveConfiguration unknown — research beforehand · doesn't decide who may dive
  • Whole caveGoes down to 135 m (trimix or deco may be needed) · doesn't decide who may dive
  • Whole caveExperienced divers only · doesn't decide who may dive
Experienced divers

This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.

How to get there

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Around Fuente Azul

FillsNo fill station known nearby
Where to sleepAround Burgos on Booking.com ↗

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News

All (1)

Accidents and incidents

What happened at this cave before, with the sources. No names are given; read it as a lesson for your own planning.

Access and rules change: check what applies locally right before your trip. Source: GDELT Project and the news feeds of diving magazines. Search for more news ↗ Searched automatically, last on 13 Nov 2026.

More of the latest in Northern Spain (Burgos, Soria, Cantabria): conditions, closures and news →

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Sources, sharing and disclaimer

Sources

Current conditions

Visibility, flow and water levels change quickly. Right before your dive, check what other divers report:

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Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from web research (G.E. Edelweiss, G.E. Niphargus, Espeleobuceo en Burgos blog, Matienzo Caves Project, UTD, Pegasus Caving Club, Soria Noticias, Turismo Burgos, BOE Ley 15/2008, Montaña Regulada, the SEMH hyperbaric-centre list, dive-centre websites, Wikipedia; Sept 2026). Pins from Wikipedia, club catalogues (UTM converted to WGS84) and OSM; ~ = estimate (drive times too). Rules change — check locally. Ojo Guareña and A Buraca das Choias: Cuevas Turísticas, the Espeleobuceo en Burgos blog (S.I.E. Burgos), BurgosNoticias, G.E. Edelweiss, El Progreso, GCiencia, Malamalama, Aventuras en Galicia and the Colegio de Enfermería de A Coruña (Ferrol chamber).