Skocjan Caves are problably the most beautiful caves in Slovenia beside Postojna Cave. Postojna Cave is interesting because of train ride and it is also more touristic. Skocjan Caves on the other side has very interesting stalactites and great walk above canyon of river Reka. It takes more than one hour to get through the cave. Also outside part of the cave is very interesting where you come in Velika doline. There is view on waterfall. A little further you can also see beautiful troughs of river Reka that are located between Velika and Mala dolina.