Tour description provided by Viator

On this day we take you to the biggest and worldwide known Slovenian cave system - the Postojna caves. A two million years old and 21 km long system of subterranean caves is one of the most easily accessible network of underground caves in the world. A ride by electrical train will be followed by a guided walk through a series of cave halls with drop stones, pillars and translucent curtains that create unforgettable impressions. The underworld system is a home of the mysterious, unique and rare amphibian Proteus Anguinus, or human fish as it is popularly called here.

ItineraryThis is a typical itinerary for this productStop At: Postojna Caves, Postojna, Inner Carniola RegionPostojna cave entrance feeDuration: 1 hour 30 minutesStop At: Predjama Castle, Postojna, Inner Carniola RegionPredjama Castle entrance feeDuration: 1 hour