Greece · about 1 km from Vouliagmeni
Lake Vouliagmeni
- Max depth127 m
- CertificationFull cave
- Water temperature≈ 22–29 °Cestimated, no reports yet
- SpecialDPV-suitable
Diving and fills
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What it looks like
Lake Vouliagmeni Cave - Athens, Greece - Paragon Dive Group Diving in the Vouliagmeni Cave in Athens, Greece CK DV-DIVING IN VOULIAGMENI CAVE 🔦 Σπηλαιοκατάδυση στην Λίμνη της Βουλιαγμένης | LUICA VOULIAGMENI CAVE DIVING
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Videos and posts
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Lake Vouliagmeni Cave - Athens, Greece - Paragon Dive Group Diving in the Vouliagmeni Cave in Athens, Greece CK DV-DIVING IN VOULIAGMENI CAVE 🔦 Σπηλαιοκατάδυση στην Λίμνη της Βουλιαγμένης | LUICA VOULIAGMENI CAVE DIVING
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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
The brackish lake of 260 × 145 m has water of 22–29 °C (27 °C at -40 m, up to 29 °C deeper). There is a freshwater source at -17 m; the bottom is mud rich in sulphur compounds.
1 earlier accident or incident has been reported at this cave. Read what happened ↓
Profile and sections
The brackish lake of 260 × 145 m has water of 22–29 °C (27 °C at -40 m, up to 29 °C deeper). There is a freshwater source at -17 m; the bottom is mud rich in sulphur compounds. At -105 m, ~730 m from the entrance, stands a ~5 m speleothem.
The lake formed when the roof of a large cave collapsed. The cave has been explored since 1988 under the Ministry of Culture, with Swiss, Italian, French and Greek teams (1989–2005). The area is Natura 2000, 'Site of Special Natural Beauty' and Ramsar wetland.
Practical: the smaller Lake Zolotas to the south (-17 m) remains closed.
- Depth and profile
- Northern entrance: 10 × 15 m cleft, first chamber with daylight to -33 m, then the 'Window' (3 × 1.5 m) into the main hall at -40 m. Main Cave ~650 m long, 60–150 m wide: first 150 m at ~-65 m, most diving at -90 to -105 m, max -127 m (T2B; Addicted2H2O: -130 m). Luica: avg -35 m, max -50 m (siphon in the north-east). Parking: max -25 m, ~100 m. In total 4.2 km of passages within 933 m of penetration.
- Configuration
- Roomy: all configurations. Given the depth (-90 to -105 m) and the deco, CCR with trimix is the practical choice; ask which configurations the permit allows.
- DPV: DPV-suitable (estimate)
- Large, deep main hall (650 m long, -65 to -105 m): a scooter saves a lot of bottom time. Ask the management whether scooters are allowed.
Who can dive where
- At least Full cave
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Goes down to 127 m (trimix or deco may be needed)
- Experienced divers only
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
Only with a permit from the lake's management company (Thermal Loutra Vouliagmenis – Tourist Enterprises SA) and under the supervision of an affiliated cave-diving instructor. The lake is a paid thermal bathing lake; you enter from the shore. The cave entrance is in the northern part of the lake.
Around Lake Vouliagmeni
FillsNo fill station known nearby
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Caves nearby2 within 59 km
News
All (2)
Nearby
Articles about cave diving that name a place within 25 km of this site, but no cave by name. They're not necessarily about this site.
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.
- Eight divers have died in the cave, mostly in the 1980s and 1990s; in 1995 the cave was closed to general diving for safety reasons.
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.
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