Križna Cave

Križna Cave, about 7km north of Snežnik Castle and a kilometre or so after you turn off the main road from Cerknica, is one of the most magnificent water caves in the world. It is 8.8km long and counts 22 underground lakes filled with green and blue water as well as a unique 'forest' of ice stalagmites near the entrance. The dry part of the cave, which includes a short boat ride, can be toured without booking in advance.

To go as far as the Kalvarija chamber by rubber raft via 13 lakes (around €25 to around €29), you must contact the guide named Alojz Troha, in Bloška Polica (house No 7) near Grahovo, in advance (041-632 153). It's a four-hour tour if you elect to do the entire cave, and the price includes all equipment.