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Explore Slovenia’s extraordinary underground world and medieval fortress on this 5.5-hour small-group tour from Ljubljana, including hotel pickup and expert guides.
Discover the fascinating underground landscapes of Postojna Cave and the dramatic cliffs of Predjama Castle on this well-organized small-group tour from Ljubljana. Priced at $85.38 per person, the tour lasts approximately 5 hours 30 minutes and offers a relaxed, intimate experience with a maximum of eight participants. With hotel pickup and drop-off included, you avoid the hassle of public transport and can focus on the sights, guided by knowledgeable hosts who guarantee a smooth day of exploration.
This tour is perfect for those who appreciate natural wonders and medieval architecture, along with a personal touch, thanks to the small-group format. While the Postojna Cave charges an entrance fee of 44 euros, the tour includes a discount of 10% on tickets, making it a solid value for the experience. The only notable consideration is that the cave and castle admission tickets are not included, so plan for that extra cost.


The tour begins with a visit to Postojna Cave, one of the world’s most famous karst caves with a history of over 38 million visitors. The Pivka River shaped this underground marvel, creating a complex network of tunnels, galleries, halls, and passages over the course of millions of years. Visitors walk through this spectacular setting, marveling at stalactites, stalagmites, cave curtains, petrified waterfalls, and cave pearls.
A highlight within the cave is the “human fish” or “proteus”, a blind animal uniquely adapted to the total darkness of its underground habitat. This creature exemplifies the extraordinary natural adaptations found in the cave’s ecosystem. The guided tour ensures that visitors learn about these formations and the cave’s geology, making the experience both visually stunning and educational.
While the admission ticket to the cave is not included in the tour price, the discounted tickets make the experience more affordable. Expect about 2 hours inside the cave, during which the guide explains the cave’s history, geology, and unique features.
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Following the underground adventure, the tour continues with a self-guided audio tour of Predjama Castle. Known for its dramatic location on a towering cliff, the castle is a remarkable example of medieval architecture. The audio guide, available in multiple languages, offers insights into its construction, history, and the legends surrounding its past inhabitants.
The castle’s unique position on the cliff makes it a striking sight, with its stone walls blending into the natural landscape. Visitors can explore the interior, admire the castle’s defensive features, and learn about its medieval story. The visit typically lasts 1 hour 30 minutes, during which the guide provides context and highlights the castle’s architectural feats.
The admission fee to Predjama Castle is also not included in the tour price, but with the discount, it becomes an attractive option for history enthusiasts. The castle’s location and architecture offer great photo opportunities and a glimpse into Slovenia’s medieval past.

The tour departs from Ljubljana at 1:15 pm, with hotel pickup and drop-off included in the package. Travel is in an air-conditioned minivan, providing comfort and ease as you move between the sites. The small-group format, limited to eight travelers, allows for more interaction with the guide, personalized explanations, and fewer crowds, especially at popular sites.
The guide, whose expertise shines through in their commentary, ensures the pace suits the group and manages logistics smoothly. The activity ends back at the original meeting point in Ljubljana, making it a hassle-free day trip.

This tour is suitable for most travelers, and service animals are allowed. While walking inside the cave involves some steps and uneven surfaces, the overall pace is manageable for most ages and fitness levels. The most time is spent outdoors at Predjama Castle, which involves walking around the castle grounds and some stairs.
The tour requires additional payment for entrance tickets—44 euros in total—so budget accordingly. Food and drinks are not included, so bringing snacks or water is recommended for comfort during the day.

Based on reviews, the guides like David and Nate are praised for their friendly, knowledgeable, and lively commentary. They give helpful recommendations for exploring Slovenia beyond the tour and ensure the group feels well cared for. The pacing of the tour balances the sightseeing with enough time at each location, though some might prefer slightly longer at the castle if they love history.

What sets this Postojna Cave and Predjama Castle tour apart is its small-group format and included hotel transfer, creating a relaxed and intimate experience. The guided exploration of the cave’s natural wonder and the dramatic castle offers a comprehensive day of sightseeing without the hassle of independent planning.
The discounted entrance tickets add to the value, although travelers should be prepared for the additional cost. The expert guides and efficient logistics make this a highly recommended option for visitors seeking a full, engaging day outside Ljubljana.

This tour is ideal for first-time visitors to Slovenia keen to see its key natural and historical sites in one day. It’s perfect for those who appreciate guided tours with small groups, as well as travelers interested in geology, medieval architecture, and legendary castles. The comfortable transport and expert commentary make it accessible for most ages and physical abilities.

The $85.38 price point offers good value for a well-organized, small-group experience that covers two of Slovenia’s most iconic landmarks. The hotel pickup, guided tours, and discounted tickets contribute to a seamless, enjoyable day. The caves and castle provide visually stunning and historically intriguing sights, guaranteed to leave a lasting impression.
While the admission fees are extra, the overall experience compensates with expert guides and a relaxed pace. This tour suits those who want a comprehensive, personal exploration of Slovenia’s natural and medieval heritage in a manageable timeframe.
“This is an absolute must do when you visit ljubljana. The group is nice and small and the guide knows his his way around”
Are the entrance fees included in the tour price?
No, the Postojna Cave and Predjama Castle admission tickets are not included, but a 10% discount is available through the tour.
Is this tour suitable for children or older adults?
Yes, most travelers can participate, with manageable walking involved. The tour is suitable for a broad age range, but some walking in the cave and castle may require mobility.
What should I bring for the tour?
Comfortable shoes for walking, and perhaps snacks or water, as food and drinks are not included. Remember to bring your admission tickets or plan to purchase them on site.
How long does each site visit last?
The Postojna Cave visit lasts about 2 hours, and the Predjama Castle self-guided tour takes approximately 1 hour 30 minutes.
What kind of transport is used?
Travel is in an air-conditioned minivan that departs from Ljubljana and returns directly to the meeting point.
Can I cancel this tour?
Yes, cancellations are accepted up to 24 hours in advance for a full refund.