Postojna Cave is a network of 20 kilometers of passages, galleries and chambers into which experienced guides have accompanied more than 35 million visitors in the last 188 years. It is the largest cave in the “classic karst” and the most visited show cave in Europe. Visitors to the cave are dazzled by a wealth of speleothems: calcite formations, stalactites and stalagmites abounding in a variety of shapes, colors and age. Take the train through the underground world of the largest cave in the “classic karst” and the most visited tourist cave in Europe to see magnificent caverns and glistening stalactite formations. Postojna is the jewel in the Karst Region crown due to the magnificence of those mighty caves that have been delighting thousands of visitors for years now. The World Famous Postojna Caves are simply awe-inspiring and a tourist spot you do not want to miss exploring.