Ljubljana: Postojna cave & Predjama castle small group tour
Overview
Available languages
5 hours 30 minutes
Mobile ticket
Visit two of Slovenia’s top attractions in one afternoon on this small-group, half-day tour from Ljubljana. Begin at Predjama Castle, perched on a cliff high above the beautiful Inner Carniola region. Explore the chambers and stairwells and learn about the castle’s most famous resident, Erazem of Predjama. Then, continue to Postojna Cave. Ride a mini-train deep into the famous cave and tour the ethereal network of stalactites, stalagmites and caverns with a local guide. Numbers limited to eight people, ensuring a personalized experience.
Postojna Cave 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 and it is a must-see attraction when visiting Slovenia. You will start the tour with a unique and adventurous ride with a special train in one of the most diverse cave systems in the world, with 21 km of passages, galleries and magnificent halls, which offer an unparalleled experience of the underground world and a large diversity of underground animals – including the world-famous human fish (proteus anguinus). Beside Postojna Cave you will also have the chance to visit Predjama Castle. Our guide will show you this magnificent medieval castle perched high up in a vertical cliff in the idyllic village of Predjama. It is an interesting and romantic sight throughout the year: in the spring and summer its surroundings are abundant with blossoms and flowers, in the autumn it is clad in the colours of surrounding forests and it is at its most enchanting in the winter when the surrounding area is covered in snow.
Additional Info
Travelers should have at least a moderate level of physical fitness
Minimum numbers apply. There is a possibility of cancellation after confirmation if there are not enough passengers to meet requirements. In the event of this occurring, you will be offered an alternative or full refund.
Not wheelchair accessible.
Please keep in mind that there are quite a few stairs at the Predjama castle, but you would do that in a fairly slow pace.
Small group tour - up to 8 people per van.
Warm and comfortable clothes and footwear are essential to visit the Postojna cave (temperature in the cave is 9°C / 48 Fahrenheit).
Cancellation Policy
For a full refund, cancel at least 24 hours before the scheduled departure time.
What To Expect
Predjama Castle
Tour of Predjama Castle
Postojna Cave
Tour of Postojna cave
What‘s Included
Central Ljubljana meeting point
Comfortable transport by air-conditioned minivan
Professional English speaking guide
Postojna Cave & Predjama Castle combined ticket: from 45 € per person (dynamic prices)
Postojna cave only: from 33 € per person
Options
Small group tour - max 8 people in the van
Reviews
162 reviews
Total reviews and rating from Viator & Tripadvisor
Fantastic.
stefanov231,Apr 10, 2026
- Review from Tripadvisor
5.00Exciting experience and immersed in. Really great caves. Recommended.
Nice visit
DiBi76,Jan 1, 2026
- Review from Tripadvisor
4.00It is a very interesting cave, the largest in Europe. Part of the visit is carried out with a train, followed by a pleasant walk. Beautiful rooms, the magnificence of nature. In the surroundings you can make a pleasant stop to eat.
Great half day adventure...
Michael M,Nov 15, 2025
- Review from Viator
5.00Great half day adventure with an astonishing cave and an equally impressive castle IN a cave. Nina both drove and lead the group with aplomb. It's a great way to get out of the city and see some things (for me at least) not easily seen at home.
Postojna Cave & Predjama Castle … a great experience
jamiec265,Nov 15, 2025
- Review from Tripadvisor
5.00A fantastic day at the Postojna caves and Prediama Castle. The minibus was very comfortable and our guide, Thea, was extremely professional, knowledgeable and a lovely person. The tour was great value and a great use of our precious time in Slovenia. I would recommend this tour to all.
Amaizing
Werner W,Oct 26, 2025
- Review from Viator
5.00It is a Must to go there, we have Seen many Caves, but this is by far the most Impressive cave and well organised
This is what I want from a tour company!
kentgwashburn,Sep 19, 2025
- Review from Tripadvisor
5.001. Punctual. 2. Clean, comfortable vehicle. 3. Guide Izidor a good, safe driver. That mattered to us. 4. Guide Izidor knowledgeable, fit his Slovenia presentation to group level of interest. 5. Guide Izidor also personable. Felt we got acquainted with an interesting Slovenian. 6. Price seemed fair.
Must do tour!
Melinda L,Sep 15, 2025
- Review from Viator
5.00Jan was a fantastic guide! The caves should be the 8th wonder of the world- truly spectacular! The castle was also very interesting.
Amazing experience luxury modern van
Rich J,Aug 23, 2025
- Review from Viator
5.00Very very nice tour bus. Super spacious and luxurious. Tour guide was nice and knowledgeable. Both sites I would consider to be must dos on your trip to Slovenia
Excellent tour company and great destinations!
EveryNameIsTaken9987,Aug 11, 2025
- Review from Tripadvisor
5.00We liked this tour company (Slovenia-Explorer) so much that we did two tours with them. First, Predjama Castle plus Postojna Caverns (one tour) and, second, a tour to Lake Bled (including the castle). They do offer a tour that would hit all three destinations in one day, but that would make for a rather long day. On both tours, the destinations were great. The caverns were probably our favorite, because they were a bit more unique. The drivers on both days were fantastic (we particularly remember Jan, who had the advantage of having studied history in college) and we got a great mix of local color, ancient history, history from the Yugoslavia era to the present, and humor. The vans were clean and modern and the communication was clear and timely, which made everything simple and easy. The drives are also not too long—about 45 minutes each way. Great tours and a great tour company!
Great day trip from Ljubljana
Neil H,Jul 17, 2025
- Review from Viator
5.00This far exceeded our expectations. Although this wasn't a private tour, this van was comfortable and our guide was knowledgeable and personable. It seemed like a private tour and we made quick friends of the other people. The cave and particularly the train was much more fun and impressive than I would have imagined. The castle was also really unique given the setting into the mountain. I would highly recommend this tour.
From €68.00
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Operated by Gray Line Slovenia Explorer