Cross-section map of the world's deepest underwater cave in Hranice Abyss (Czechia), so far 400 m deep with its bottom still not found

Cross-section map of the world's deepest underwater cave in Hranice Abyss (Czechia)

The lowest confirmed depth (as of 27 September 2016) is 473 m (404 m under the water level). The expected depth is 700–800 m.

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