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. Moreover, the expected depth is 800–1200 m.
The Hranice Abyss was created by a collapse of the cave roof, which was eaten away by warm carbonic acidulous spring water in limestone.
- "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.
|Wikimedia Commons has media related to Hranická propast.|
|This Olomouc Region location article is a stub. You can help Wikipedia by expanding it.|