The ©kocjanske jame present the biggest natural curiosity of the whole Classical Kras. The natural reserve ©kocjanske jame with the vicinity was listed in 1986 as natural and cultural heritage of the world at UNESCO as the example of caves of extreme dimensions and karst landscape with rich history and interesting cultural traditions.
By gradual karstification the valley of the Reka got incised more and more. The actual Reka ponor lies under the 108 m high wall of ©kocjan on 317 m above see level. The entrance passage is narrow and high, developed along a bigger fissure, therefore the passages reach 50 to 80 m. The axis of Skocjanske jame is presented by 2.5 km long underground canyon which has no lateral active water channels, at the end of which a deep unexplored syphon exists. With its dry higher channel rich in speleothem, with its mighty huge water channel, with its archeological and biological importance, this cave is, besides the Postojna cave, the greatest jewel of the Slovenian karst, which is not yet fully appreciated in tourism.