Hranice Abyss
The Hranice Abyss (Czech: Hranická propast), the English name adopted by the local tourist authorities, is the deepest flooded pit cave in the world. It is a karst sinkhole located near the town of Hranice (Přerov District). The greatest confirmed depth (as of 27 September 2016) is 473 m (404 m under the water level), which makes it the deepest known underwater cave in the world.[1] Moreover, the expected depth is 800–1200 m.[2]
![](../I/m/H%C5%AFrka_u_Hranic_(31).jpg)
Hranice Abyss
The Hranice Abyss was created by a collapse of the cave roof, which was eaten away by warm carbonic acidulous spring water in limestone.[3]
![](../I/m/Hranice_Gouffre_40434.jpg)
Map of the cave
References
- "Exclusive: Deepest Underwater Cave Discovered".
- "Hranice Abyss is believed to be 1200 m. deep (in Czech)".
- Hranice Gorge and Zbrasov Aragonite Cave, official leaflet 2012.
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