We first visited Postojna Cave the train takes you 3.7km into the caves and then you walk for 1.5km into the massive cave system. The tour takes 90 mins in the 10c cave. We then stopped overnight in the car park and after breakfast moved the 9km to the largest cave castle in the world at Predjama. We had audio guide tour taking about 1 hr and seeing most of the rooms and the cave castle behind.
Postojna Cave
Predjama Castle
