Slovenia · about 4 km from Semič
Izvir Krupe
Closed to divers
Recreational diving is banned: the whole Krupa is a natural monument, and along the entire river, including the spring and the other springs, boating, rafting and recreational scuba diving are prohibited. Dives here were only for scientific research, under supervision and with permits from the competent authorities.
- Max depth7 m
- CertificationFull cave
- SpecialExperienced divers
Diving and fills
Dive here with
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Fills nearby
- Fill stationDive Center Krk (Kornić)Air and nitrox (to 40 % €8, to 100 % €14 per fill, 2026); air in your own cylinder only with a valid inspectionRoute ↗
Now at Izvir Krupe
What it looks like
All 1 videos and posts
Videos and posts
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dscbelakrajina
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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
At the foot of a 30 m cliff lie deep, clear basins with water plants up to 4 m tall. The current is weak and the water is ~10 °C in summer.
Profile and sections
At the foot of a 30 m cliff lie deep, clear basins with water plants up to 4 m tall. The current is weak and the water is ~10 °C in summer. The cave clam Congeria kusceri, cave snails and the olm live here.
The Krupa is the largest spring in Bela krajina (min. ~400 l/s). In October–November 2010 a diver of Potapljaški klub Bela krajina explored ~60 m of passage behind the spring and found living cave clams there. For decades the Krupa was heavily polluted with PCBs from a capacitor factory in Semič.
Practical: the spring is a natural monument and Natura 2000 site.
- Depth and profile
- Spring pool to -7 m above the first weir, -4 m between the first and second weir · behind holes under the cliff ~60 m of flooded passage to -6 m with air chambers (explored 2010)
- Configuration
- Spring pool: plain open water. The passage starts at small holes under the cliff (per the dive atlas 'no real underwater cave'): small sidemount at most.
- DPV: Not DPV-suitable
- Small and shallow; motorised craft are also banned in caves (ZVPJ art. 18).
Who can dive where
- At least Full cave
- Configurations: Sidemount / Small cylinders / no-mount (speleo sumps)
- Goes down to 7 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
Park before the hamlet of Krupa, before the turn-off onto a narrow gravel road; then ~200 m on foot to the first mill.
Around Izvir Krupe
Fills1 fill station · 81 km
Dive Center Krk (Kornić)
Dunat 50, 51517 Kornić, Krk
Air and nitrox (to 40 % €8, to 100 % €14 per fill, 2026); air in your own cylinder only with a valid inspection
Daily 9:00–19:00
PADI 5 Star Dive Resort by Dunat beach (Kornić) with three boats. Dives a string of caverns and tunnels in the Kvarner: Vrbnik Cave on Krk, Big Cave and Blue Hole off Cres, the Geierfels at Plavnik and the Prvić tunnel. Guide €12 per dive (2026). No trimix or cave courses mentioned.
Caves nearby1 within 44 km
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