If you haven't heard of Postojna yet, you will surely remember it after visiting Postojna Cave. Postojna prides itself upon Postojna Cave, a magnificent karst cave the Pivka River created over a period of two million years. Many explored as well as unexplored caves capture the imagination of the many travelers, divers and explorers from all ends of the world. You can view Postojna Cave from a little train. During the train ride, you can admire spectacular stalactites, stalagmites, pearls, curtains and other artworks of mother nature.

And don’t forget to pay a visit to Predjama Castle, located only 9 kilometers from Postojna. A scenic castle, built within a rock, is entered in the Guinness Book of World Records as the largest cave castle in the world.