Croatia
Vrelo Une
- Max depth248 m
- CertificationFull cave
- Water temperature≈ 8–11 °Cestimated, no reports yet
- SpecialExperienced divers
Diving and fills
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The dive
The water is 8–11 °C (avg 9.5 °C), and the discharge varies strongly by season (Garašić gives ~100 m³/s). Vrelo Une is the deepest explored spring of the Dinaric karst, and per Wikipedia the fifth deepest in the world.
Profile and sections
The water is 8–11 °C (avg 9.5 °C), and the discharge varies strongly by season (Garašić gives ~100 m³/s).
Vrelo Une is the deepest explored spring of the Dinaric karst, and per Wikipedia the fifth deepest in the world. It has been a hydrological natural monument since 1968, managed by Natura Jadera (Zadar county); the canyon (830 ha) is part of the ecological network (Natura 2000).
- Depth and profile
- Vertical spring shaft: -51 m (first official dive, 1999) · -205 m (2005–2007; sources differ on diver and year) · -248 m (Luigi Casati, 2016), bottom not reached
- Configuration
- Deep, roomy shaft; only for deep trimix/CCR expeditions.
- DPV: Not DPV-suitable (estimate)
- Vertical shaft; a scooter makes no sense here.
Who can dive where
- At least Full cave
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Goes down to 248 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
Spring area at Donja Suvaja near Srb; entry €3 per person (2026), facilities recently renovated. Round pool of ~30 × 15 m below steep cliffs.
Around Vrelo Une
FillsNo fill station known nearby
Caves nearby6 within 56 km
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