Kostanjevica Cave lies at the foot of the Gorjanci hills, a diverse karst terrain with cretaceous limestone. Rain water, subterranean watercourses and tectonic movements spent millennia creating dreamlike cave formations with fairytale motives.
The footpaths in the cave are suitable for children as well as older visitors. A guided tour with explanation lasts 40 minutes. The constant temperature in the cave is 12 degrees Celsius.