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Hranice Abyss

(1,533) Tourist attraction in Hranice, Czechia
Hranice Abyss is the deepest flooded pit cave in the world. It is a karst sinkhole near the town of Hranice, Czech Republic. The greatest confirmed depth is 519.5 m, of which 450 m is underwater.
Address: 753 01 Hranice 1, Czechia
Hours: Open 24 hours