Predjama Castle is a short hop from Postojna and is one of the world's most dramatic castles. It teaches a clear lesson: if you want to build an impregnable redoubt, put it in the gaping mouth of a cavern halfway up a 123m cliff. Its four storeys were built piecemeal over the years from 1202, but most of what you see today is from the 16th century.
Cerknica is the largest town on a lake that isn’t always a lake – one of Slovenia’s most unusual natural phenomena. It’s an excellent springboard for the gorge at Rakov Škocjan and Notranjska Regional Park as a whole. Cerknica lies about 3km north of Lake Cerknica. Cesta 4 Maja is the main street in the centre of town.