Marble Caves is a cave in Crimea, at the lower plateau of Chatyr-Dag, mountainous massif. It is a popular tourist attraction being one of the most visited caves in Europe.
Due to its uniqueness, the Marble Cave became famous worldwide. Speleologists consider it among the top five most beautiful caves of the planet, and one of the Seven Natural Wonders of Ukraine. In 1992, it was included in the International Association of equipped caves.
Wikipedia https://en.wikipedia.org/wiki/Cueva_de_Mármol_(Crimea)
Address (Unnamed Road), Ukraine
Coordinates 44°47'50.059" N 34°16'46.026" E