Cave diving · Europe
Cave diving in Czechia
Czech cave diving is best known for Hranice Abyss, the deepest known flooded abyss in the world, explored by the Czech Speleological Society's group ZO 7-02 Hranický kras with deep rebreather dives to 265 m and robotic surveys beyond 450 m.
How access works
Karst features such as Hranice Abyss lie in protected areas managed by the Nature Conservation Agency of the Czech Republic. Research and diving there are carried out by Czech Speleological Society groups under exemptions from Act No. 114/1992 Coll. on nature and landscape protection; no public diving access is published for the abyss.
A general summary; each site page gives its own dated access information.
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Cave systems
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Entrances and dive sites
| Site | Cave system | Type | Access | |
|---|---|---|---|---|
 |
Hranice Abyss – shaft and lakeHůrka u Hranic National Nature Reserve, Hranice | Hranice Abyss | Sinkhole | Restricted access |
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Dive centres and guides
| Provider | Where | Checked |
|---|---|---|
| ZO ČSS 7-02 Hranický kras | Hranice | 2026-10-14 |
A listing is not an endorsement.
Every fact on this page, with its source (2)
| Fact | Status | Source |
|---|---|---|
| The deepest point reached by a diver at Hranice Abyss is 265 m (2015), and the water depth was measured at 450.6 m in 2022. | Verified | [2] |
| Research at Hranice Abyss is carried out under an exemption from Act No. 114/1992 Coll.; the surrounding reserve is managed by the Nature Conservation Agency's Olomouc office. | Verified | [1] [2] |
Verified: stated by an official or primary source we opened. Reported: from a secondary source only. Sources conflict: the note gives both versions. May be out of date: the newest source we found is old.
Written in our own words from the sources above. Report a correction