It is beautiful and the train ride is very cool. It is quite cool so bring a jacket to keep warm and good shoes as the pathway is wet.





Visit Postojna Cave, the best-known cave in the world, and The Predjama Castle, the only preserved cave castle in Europe.
In demand: 13 of the next 30 departures are already sold out.
From the operator’s live schedule on Viator, checked Oct 7.
Your guide will pick you up at the agreed starting point in Trieste - hotel, cruise terminal, train station etc. (please contact us after the booking so the appropriate arrangements can be made).
Postojna Cave, the queen of all caves, is the best-known cave in the world. It is also the greatest tourist attraction in Slovenia and one of the world’s largest karst monuments. This is the only place in the world where the underground landscape can be traversed on an electric train and where you get to meet this underground kingdom’s most famous inhabitant – the proteus (olm) – up close. A fantastic web of tunnels, passages, galleries and halls, astonishing diversity of karst features, as well as easy access are certainly the main reasons for such popularity of the cave and a large number of visitors (more than 36 million of them in over 200 years).
The Predjama Castle reigns over the surrounding area, not far from the Postojna Cave, in the idyllic village of Predjama. This picturesque, magnificent, defiant, mysterious and impregnable castle has been perched up in the middle of a vertical 123-meter high cliff for more than 800 years. Its romantic appeal is further emphasized by the idyllic Lokva River, which disappears into the underground world deep down below the castle. As the only preserved cave castle in Europe, the Predjama Castle offers a unique insight into the building techniques and resourcefulness of people in the Middle Ages, who were looking for and found a safe harbor for themselves right at the entrance into the cave. During a siege that took place in the 15th century, the castle provided a refuge for its best known and most notorious owner - Erazem of Predjama. The legend about the courageous robber baron Erazem, who remained undefeated until one of his servants betrayed him, is still in people’s minds, inspiring and alluring as ever. It was this safe abode of his which helped the brave knight resist the besiegers without much difficulty for more than a year.
Reviews collected by Viator and Tripadvisor
Excurgo comparison of 204 Viator tours, recalculated daily.
For a full refund, cancel at least 24 hours before the scheduled departure time.
Postojna Cave & Predjama Castle - Small Group Tour from Trieste lasts about 5 hours. The itinerary has 3 stops.
Prices start at $143 per person for this Trieste experience, booked through Viator with the price shown before checkout. There is 1 booking option, so the final price depends on the option you choose.
According to the operator’s current schedule, it runs every day.
It can: 13 of the next 30 departures are already sold out, so booking ahead is a good idea.
Yes. Cancel at least 1 day before the start for a full refund. Later cancellations are non-refundable.
Yes, pickup is offered.
The experience is available in DE, EN, IT.
It is a small-group experience with a maximum of 50 participants.
Infants are required to sit on an adult’s lap Specialized infant seats are available Infants and small children can ride in a pram or stroller
Transportation options are wheelchair accessible Wheelchair accessible
Yes, bookings are confirmed instantly.
Reviews collected by Viator and Tripadvisor
It is beautiful and the train ride is very cool. It is quite cool so bring a jacket to keep warm and good shoes as the pathway is wet.
Cave and castle both must see in Slovenia. Trip left us speechless. Stefan our tour guide had good knowledge about history and we spent nice time. Definitely i will recommend this trip to everyone who wants to visit Slovenia.
We did not expect such a great tour of this amazing cave. It was not only one of the largest caves we ever experienced, but equally beautiful as well. The tour guide did an amazing job explaining all the details.
The Postojna Cave & Predjama Castle - Small Group Tour from Trieste was even better than we imagined! The Predjama Castle was absolutely incredible—built right against the wall, it’s a sight to behold. There were lots of stairs to climb, but we loved the architecture. The Postojna Cave was truly spectacular. Stephan, our driver, was so friendly and shared his knowledge of the region with our group.
It is a wonderful day, lots to see. There is lots of walking in the caves, up hills and down but not too strenuous. The castle through is built into the side of a cliff so lots of steps. Mia was a wonderful guide for the day.
Beautiful, but lots of stairs, some very steep. The portion of Slovenia we saw was gorgeous. Will plan on returning.
I had an absolutely unforgettable experience visiting Postojna Cave in Slovenia. The cave itself is breathtaking, with massive stalactites and hidden chambers. The highlight was definitely the train tour—such a front-row seat to the cave’s magic. We did book a private small group tour, but unfortunately, it ended up being a large bus with a lot of cruise passengers, which was a bit disappointing. Still, the cave itself and the guide were phenomenal—it’s a must-see in Slovenia!
It is worth it. You visit two spectacular sites with enough time to see everything. There is no guide in Spanish, but with an Italian guide and the audio guides in Spanish, it is sufficient to understand what you are visiting.
Good tour, operator was friendly and knowledgeable. Trip to the caves was comfortable and the return was prompt.
What can I say? Postojna Cave was an awesome experience, massive in size and truly spectacular. History of Predjama Castle was interesting. Tour hostess and driver were great
| Tour | Duration | Rating | Price | |
|---|---|---|---|---|
Postojna Cave & Predjama Castle - Small Group Tour from Trieste | 5 hours | 4.8 (53) | $143 | |
Postojna Cave & Predjama Castle from Trieste | 5 hours | 4.7 (139) | $143 | View |
Postojna Cave & Predjama Castle excursion - Entrance fee included | 5–6 hours | 4.8 (48) | $223 | View |
Postojna Cave & Predjama Castle - Shore Excursion from Trieste | 6 hours | 4.8 (30) | $140 | View |
Postojna Cave and Predjama Castle - Private Tour from Trieste | 6 hours | 5.0 (14) | $332 | View |
Miramare Castle Entrance Ticket in Trieste | 2–3 hours | 3.6 (39) | $29 | View |
Panoramic Tour of Trieste and Miramare Castle | 4 hours | 4.5 (24) | $132 | View |