Stock Photo - A part of the Koneprusy Caves, cave system of the limestone region known as Bohemian Karst, is seen on July 31, 2019, in Koneprusy, Czech Republic. (CTK Photo/Michaela Rihova)

Stock Photo: A part of the Koneprusy Caves, cave system of the limestone region known as Bohemian Karst, is seen on July 31, 2019, in Koneprusy, Czech Republic.

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