Križna Jama Cave

Križna Jama is a long water cave in southern Slovenia, close to the village of Bloška Polica and the Lož Valley, in a part of the country known for its karst plateaus, forests and sinking rivers. It has a series of underground lakes that lie one after another along the cave, and the water is a clear green that is often compared to emerald. The cave is among the best-known in the Classical Karst region, along with Postojna and Škocjan, and it differs from them because much of the visit is by boat and on wooden walkways rather than on dry floors.

The cave is also famous for what has been found in it. Cave bear bones, from an animal that lived here during the last ice age, have been recovered in large numbers, and people have used the entrance area in prehistoric times. It is an important site for cave-dwelling animals as well, including a rich set of small specialised invertebrates and bats that spend part of the year inside. The cave acts as a channel for underground water that flows from the Bloška plateau toward the Cerknica polje, which explains why the passages are shaped by flowing water and filled with pools.

The usual tour starts with a walk through dry galleries, with guides explaining the geology and the animal remains, and then continues across the first lake by boat. Passengers sit quietly while the guide steers or pulls the boat along the water, and the silence, interrupted only by dripping, is part of the appeal. The air is cold and damp, so warm clothes and sturdy shoes are essential, and waterproof boots and lamps are provided by the operators. Longer expeditions with more lakes can be arranged by reservation for those who want more adventure, and they require good fitness and acceptance of cold, wet conditions.

The Lož Valley is also worth a stop. The small town of Lož has a Hunting Collection and Dormouse Museum, which explores a curious local tradition of hunting the edible dormouse, once a seasonal source of food and fur in these forests. The surrounding landscape includes the great forests around Snežnik, and in winter the cave remains at a steady temperature, so it can be visited in any season. Because tours run at set times and group sizes are limited, booking in advance is wise.