Slovenia, Skocjan Cave

Skocjan Caves represents the most significant underground phenomena in both the Karst region and Slovenia. Skocjan Caves was also entered on the List of Ramsar wetlands of international importance on 18 May 1999. Together with the underground stream of the Reka River, they represent one of the longest karst underground wetlands in Europe.
Explored length of caves is 6,200 m, caves have formed in 300 m thick layer of Cretaceous and Paleocene limestone.