Veliko okence (Retovje)
Cave diving in Slovenia · about 1 km from Vrhnika
- Max depth
- 25 m
- Type
- Not known yet
- Certification (estimate)
- Full cave
- DPV
- Not DPV-suitable
One of the two strongest springs of Retovje, a steephead valley where the Velika Ljubljanica rises; after almost 1 km it joins the Mala Ljubljanica (from the Močilnik springs) to form the Ljubljanica.
More about Veliko okence (Retovje)
Signed-in divers also see:
- Whether this site fits everyone's certification, gas and gear
- Access, parking and the route from the road
- Exact map pin and navigation
- Depth profile and sumps
- Configuration advice
- DPV suitability
- Driving times from your stay and a plan with the AI instructor
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Current conditions
Visibility, flow and water levels change quickly. Right before your dive, check what other divers report:
- Jamarska zveza Slovenije (JZS) ↗
Slovenian caving federation: cave register, cave rescue service (JRS) and the text of the cave protection act.
- Potapljaški atlas Slovenije (SPZ) ↗
The Slovenian diving federation's atlas: 117 sites with GPS, depth, temperature and rules (mostly open water and rivers).
- Društvo za raziskovanje jam Ljubljana (DZRJL) ↗
Ljubljana caving club (since 1910) with a long history of sump diving in Slovenian caves; contact via info@dzrjl.si.
- watersports.si – PSAI-grotcursussen ↗
Dive school from Bled (Društvo Kisik – Oxygen) whose cave team dives Suhadolca, Bilpa and Veliko and Malo okence year-round.
Plan a cave diving trip to Slovenia
Enter your team, with certifications, gas and configurations, and see right away which caves fit. With driving times from your stay, fill stations and an AI instructor who thinks along.
Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from web research (Drowning Protection Act ZVU, Uradni list RS 44/2000; Cave Protection Act ZVPJ via JZS; 24ur Jan 2009 and the JZS rescue archive; Svet24 Dec 2025; RTV SLO Jul 2026; Radio Ognjišče; the Slovenian diving federation's PAS atlas and emergency list (2021); Wikipedia; kraji.eu; Moja jezera; Kam na izlet; Dolenjski kras (JKNM); X-Ray Mag and InDEPTH (2020); wannadive.net; potapljanje.si; Norik-sub and watersports.si; visit-idrija.si; Sept 2026). Pins from Wikipedia, the SPZ atlas and Kam na izlet; three sites have no pin. ~ = estimate. Rules change — check locally.