Stock Photo - ***JUNE, 1982 FILE PHOTO***Tourists are walking in the Punkva (Punkevni) Caves in Moravian Karst, Czechoslovakia, June, 1982. The Macocha Abyss (propast Macocha), also known as the Macocha Gorge, is a sinkhole in the Moravian Karst cave system, deepest of its kind (light hole type) in Central Europe. The sinkhole is 138.5 metres (454 ft) deep. (CTK Photo/Igor Zehl)

Stock Photo: ***JUNE, 1982 FILE PHOTO***Tourists are walking in the Punkva (Punkevni) Caves in Moravian Karst, Czechoslovakia, June, 1982.

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