Postojna Cave is the best-known cave in the world and definitely no secret. It is the greatest tourist attraction in Slovenia and one of the world’s largest karst monuments.
It takes some time to buy tickets and you’ll have to wait for your group to start a tour. It is not possible to discover this massive cave on your own. But it’s very impressive and the train ride is pretty fun. Then we left Slovenia and drove back to Treviso in Italy, from where our plane back to Hamburg departed the very next day. It was a very nice trip and Slovenia totally surprised me. One day I would like to go there again, with more time to explore even more beautiful places there.