Built into a 123-meter cliff face, this Renaissance castle connects to an underground cave system through secret tunnels used by a legendary knight in the 15th century.
Predjama Castle emerges from a 123-meter limestone cliff, where medieval builders integrated natural cave formations into its walls. You can walk through secret tunnels, examine weapons in the medieval armory, and peek into the vast cave network below. During winter, thousands of bats hibernate in these caves, while in summer, you can explore 700 meters of underground passages with a guide.
Exploring the Castle Interior
Walk across the drawbridge into what was once a medieval courtroom. Beyond thick wooden doors, you'll discover a dining hall protected by 5.5-foot-thick walls. In the kitchen, natural rock formations create an ingenious ventilation system. The third floor contains defensive positions with arrow slits and "murder holes" - openings where defenders poured hot oil on attackers.
The Cave System
A 14-kilometer cave network runs beneath and behind the castle. From June to August, guided tours take you through a 700-meter section. The caves close during other months to protect hibernating bats. For experienced climbers, adventure tours through Erazem's Passage require advance booking.
Visiting Information
The castle opens year-round: May through September (9:00-19:00) and October through April (10:00-16:00). Your entrance ticket includes an app-based guide, while audio guides cost an extra €2.90. Bring warm clothing - the cave-castle maintains cool temperatures throughout the year. Several parking areas exist near the castle, with overflow parking down the hill.
Getting There
The castle lies 11 kilometers from Postojna, making it a 45-minute drive from Ljubljana. During peak season, a shuttle connects Postojna Cave and the castle every 20 minutes. Combined tickets for both sites are available. From Lake Bled, drive 90 minutes, or from Piran, 75 minutes.
Historical Background
In the 1480s, Knight Erazem sought refuge in the castle after killing an imperial marshal in a duel. Emperor Frederick III ordered a siege, but Erazem used the cave system's secret tunnels to bring in supplies for over a year. Local stories tell how his downfall came when a servant revealed his location, leading to his death while using the castle's outhouse.
