Škocjan Caves

Škocjan is the cave that gave karst its name. This corner of southwestern Slovenia is the Kras, the limestone plateau after which every karst landscape on Earth is named, and Škocjan is where the processes that define it can be seen at full scale.

The Reka river runs across the surface and then simply disappears into the ground, and what it has cut underground is one of the largest known underground river canyons in the world. The Martel Chamber is enormous, and the gorge the river runs through inside the cave is deep enough that the path along it is cut into the wall well above the water with a bridge spanning the void. Standing on that bridge in the roar of the river is the reason people come.

That scale is the difference between Škocjan and its famous neighbour Postojna, an hour away. Postojna is about decoration, formations and a train. Škocjan is about volume and moving water, and it is a considerably more physical walk, with several hundred steps.

It was inscribed on the UNESCO World Heritage list in 1986, one of the earliest natural sites listed anywhere, and the whole area is a regional park with surface trails through the collapse dolines above the cave, which are worth the time on their own.

Human use here is very old. Archaeological finds from the caves and the immediate area run back through prehistory, and the site has been a place of significance for thousands of years.

Tours are guided and seasonal in frequency, photography is restricted inside, and the underground section is cool and damp year round. It is close enough to Trieste and Ljubljana for a day trip from either.