An underground world covered with speleothems growing both upward and downward, where the illuminated section of the cave invites exploration of this subterranean realm.

Planina Cave

Planina Cave is one of Slovenia’s most important and beautiful water-filled karst caves. Located on the edge of the Planina Polje, it is best known for its remarkable natural phenomenon – the underground confluence of the Pivka and Rak rivers, which join inside the cave to form the Unica River. This is one of the largest and most impressive underground river confluences in Europe.

The cave forms part of the extensive Postojna–Planina cave system and plays a key role in understanding the hydrology of the karst landscape. Visitors are captivated by its vast underground chambers, subterranean river, impressive speleothems, and rich cave fauna, including the famous olm.

Visits to Planina Cave are possible only with a guide. The standard guided tour follows a well-maintained 500-metre route leading to the underground confluence of the rivers and lasts approximately one hour. As the temperature inside the cave remains around 10°C throughout the year, warm clothing and suitable footwear are recommended. Visitors must also carry a torch, which you may bring yourself or borrow from your guide.

For those looking for an even more memorable experience, a unique boat tour offers the chance to explore the cave’s deeper and less accessible sections.

All tours are subject to suitable conditions and must be booked in advance.

Information

T: +386 (0)41 338 696
T: +386 (0)41 304 588
E: planinskajama@gmail.com

Due to bridge renovation works, the cave is currently closed to visitors. Planina Cave is expected to reopen on 1 April 2027.

Website

An olm in its natural habitat, moving through the water among rocks in search of shelter.

The olm: The mysterious resident of the Postojna underground

Deep beneath the surface of the Postojna region, in the dark, silent waters of the karst underground, lives one of the world’s most extraordinary creatures. The olm (Proteus anguinus) is a true symbol of the underground world and one of the region’s greatest natural treasures.

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