hranice abyss karst well the pond bottom dry part there entrance

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Hranice abyss in Hranice, karst well. In the karst pond at the bottom of the dry part of the well, there is an entrance

Hranice abyss in Hranice, karst well. In the karst pond at the bottom of the dry part of the well, there is an entrance to an underwater cave, the deepest submerged cave in the world