Top Ljubljana Ziplining

Explore the fascinating network of subsurface caves during a guided tour of the Postojna Caves and Predjama Castle, leaving from Ljubljana. As you enter the two-million-year-old caves aboard a mini-train, learn about why this is one of Slovenia’s most popular attractions. Walk with your guide and witness bizarre stalactites, stalagmites, and other rock formations that make up the 13-mile-long (21 km) system of underground caves. Also venture to the enchanting Predjama Castle, a famous castle that still clings to Slovenia’s limestone cliffs.