It is the only naturally preserved tourist cave in Slovenia, so it contains no strong lighting and concrete pathways. Before entering, visitors receive rubber boots and a portable, rechargeable flashlight.

Among karst caves, Križna cave is known to the world due to it’s underground lakes. There are 22 lakes in the cave,which can be crossed by a boat, but if we also count in the smaller lakes of Blatnikov rov, the number rises to 45.

Each visit includes a boat tour. If you decide to attend a short, 1 hour tour, you cross a single – the first – lake. If you choose a longer, 3.5-4 hour tour, the path takes you across 13 lakes.

It is an active water cave with sinter dams, lakes and flowing water, which creates different rock forms, such as facets, grooves and ceiling pockets,…

Despite oligotrophicity, which means a small amount of nutrients in the water, the cave is rich in terms of underground fauna. Until year 2000, they discovered 45 underground animal species, which ranks the cave 4th in the world by it’s diversity.

Part of the skeleton (skull) can be seen during all Križna cave tours. If you want to see a larger amount of cave bear remains you can decide to attend an alternative tour of Bear tunnel (Medvedji  rov).

First known visitors were from metallic periods of time. Archaeoligists discovered a large amount of old pottery, the oldest of which are almost 5 thousand years old (from the time of Eneolithic, about 2800 B. C.). People didn’t actually live in the cave, but used it as a hideout.