Thank you showing us!
That is a magnificent feature!
A very strange structure too, in the surrounding landscape having been eroded down past the shaft so it stands rather like a vast chimney.
I forget the local word for shafts like this (I think it is tiankeng or similar), on a scale unknown elsewhere in the world; but I believe it has been adopted as the correct term by geologists, just as they respect the Japanese tsunami, Arabic wadi and the Icelandic geyser (slightly Anglicised pronunciations).
As for landscape generally formed by the dissolution of limestone, as that is, its generic term "karst" is Slovak: kras.
What a beautiful region, anyway!
