I set of for Škocjan Caves without knowing anything about them other than that they were a place to see. It turns out it was an enormous cave system with a river running through it. The main chamber was over 100 meters tall with cascades below a winding path on the wall. No pictures allowed inside, but just as spectacular out as waterfalls come out of one cave section and head into another. A massive pit in the ground surrounded by caves, waterfalls, mist, and dense vegetation. Highly recommended!