Ljubljana: Postojna Cave and Predjama Castle

Upper Carniola, Slovenia

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A double-up geographical and historical experience beginning with the Postojna Cave, one of the best-known caves in the world, before concluding with Predjama Castle, the only preserved cave castle in Europe.

Postojna Cave and Predjama Castle Tour in Slovenia

This guided tour visits Postojna Cave and Predjama Castle, suitable for history and nature enthusiasts exploring southern Slovenia.

Highlights

  • Explore one of the world’s most famous caves
  • Ride an underground electric train through the cave system
  • See the proteus, the cave's unique amphibian inhabitant
  • Discover the history of Europe’s only preserved cave castle

Description

Your tour starts at Postojna Cave, Slovenia's largest karst monument and a major tourist attraction. This cave system offers a unique underground electric train ride, allowing easy access to a network of tunnels, passages, and halls. Here, you can observe the proteus (olm), a rare subterranean amphibian native to the region.

Next, you will visit Predjama Castle, located near Postojna Cave in the village of Predjama. The castle is built into a 123-meter vertical cliff and has guarded the area for over 800 years. It overlooks the Lokva River, which flows underground beneath the castle.

Predjama Castle is the only preserved cave castle in Europe, showcasing medieval construction techniques and resourcefulness. It is historically notable as the stronghold of Erazem of Predjama, a 15th-century knight who resisted a prolonged siege aided by a secret cave passage. The castle’s story remains an enduring part of local heritage.

Includes

  • Guide
  • Transportation
  • Postojna Cave entrance fee
  • Predjama Castle entrance fee
  • Insurance

Excludes

  • Food and drinks

Easy Cancellation

You can cancel up to 24 hours in advance for a full refund.

For best experience, wear comfortable footwear and bring a light jacket as temperatures inside the cave are cool year-round. Booking in advance is recommended, especially during the peak tourist season.

Frequently Asked Questions

The tour includes guided visits to Postojna Cave with its underground electric train ride, and a tour of Predjama Castle, Europe’s only preserved cave castle in Slovenia.

Postojna Cave is located near the town of Postojna in southwestern Slovenia, approximately 50 kilometers from Ljubljana.

The combined tour usually lasts around 4 to 5 hours, depending on the group and season.

Yes, visitors can see the proteus, an amphibian native to the cave system and unique to Slovenia's karst environment.

The electric train ride inside Postojna Cave is generally accessible, but it is advisable to check for any mobility restrictions before booking.

The sites are open year-round, and visiting during spring or fall can help avoid summer crowds; check each site’s website for current hours and availability.

Advance booking is recommended, especially during high tourist seasons, to ensure availability on your preferred date.

Wear comfortable shoes and bring a jacket or sweater, as the cave maintains a cool temperature around 10°C (50°F) year-round.

Photography is generally allowed without flash to protect the cave environment, but visitors should follow all site regulations.

This tour is ideal for nature lovers, history enthusiasts, and anyone interested in exploring Slovenia’s karst landscape and medieval architecture.

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