Slovenia, Postojna Cave

Postojna Cave is without doubt one of the most diverse cave systems in the world. Its 24 kilometres of passages, galleries and magnificent halls offer a unique experience of the underground world.
The caves are also home to the endemic olm, the largest troglodytic amphibian in the world. The tour through the caves includes an aquarium with some olms in it. On January 30, 2016, a female olm at the cave began to lay over 50 eggs. This rare event led to global news about Postojna Cave and the olm. From the end of May to mid-July 2016, twenty-two baby olms successfully hatched. Karst topography refers to a plateau in southwestern Slovenia and northeastern Italy, which gave the name to karst topography.