Postojna Cave & Predjama Castle from Trieste

Overview

Available languages

German

English

Italian

5 hours

Mobile ticket

Visit Postojna Cave, the best-known cave in the world, and The Predjama Castle, the only preserved cave castle in Europe.

Additional Info

Wheelchair accessible

Infants and small children can ride in a pram or stroller

Service animals allowed

Public transportation options are available nearby

Infants are required to sit on an adult’s lap

Specialized infant seats are available

Transportation options are wheelchair accessible

Travelers should have at least a moderate level of physical fitness

Hotel Guests must advise supplier as soon as possible: hotel details

Cruise Passengers must advise supplier as soon as possible: ship name, arrival time and departure time

The temperature inside the cave is constant throughout the year (10 °C), so warm clothing and sports footwear are recommended

The tour can be booked in English, Italian, or German. Occasionally, the escort guide in the vehicle may speak only English, depending on availability, however, the guided visits in the cave and castle will be conducted in the booked language.

Cancellation Policy

For a full refund, cancel at least 24 hours before the scheduled departure time.

What To Expect

Trieste

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).

Admission Not Applicable

Postojna Cave

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).

3 hours • Admission Included

What‘s Included

Pickup and drop-off

Driver/guide

Insurance

Transportation

Food and drinks

Gratuities

Options

Postojna Cave & Predjama Castle from Trieste

Reviews

4.70

122 reviews

Total reviews and rating from Viator & Tripadvisor

Breathtaking experience
janmB6962XZ,,Nov 12, 2025
- Review from Tripadvisor
5.00
Breathtaking experience. I have not seen similar place anywhere in the world. Superb organzation. Woerth to see it. Thank you.
Amazing castle and cave
Robert A,,Nov 7, 2025
- Review from Viator
5.00
Amazing experience at both the castle and cave. Castle is even more impressive in person with lots on exhibit and overall grandeur. Cave has an amazing variety of formations with many great photo ops. Highly recommended!
Absolutely worth your time if you're in Trieste
TedSeattle,,Nov 3, 2025
- Review from Tripadvisor
5.00
Truly an experience not to be missed. Dejan picked us up in Trieste and drove us into Slovenia, first to Predjama Castle and then to Postonja Cave. Postonja Cave in particular was astonishing; even if you don't think you're interested in caves, you should see it. Dejan was also delightful, providing anecdotes about the history of the region. The beginning of November was a good time to visit, as neither site was overwhelmed with visitors.
Stunning.
Carlos S,,Oct 27, 2025
- Review from Viator
5.00
Competent Service. Compliance with schedule. Friendly and attentive guide. A walk, pleasant and wonderful.
Postojna caves
Ken I,,Oct 18, 2025
- Review from Viator
5.00
The cave and castle was amazing. Definitely a must do when visiting Trieste. Our guide was knowledgeable and informative and most of all funny.
Fabulous tour
Kathi S,,Oct 11, 2025
- Review from Viator
5.00
The best exploration tour we had in 16 days of traveling the Mediterranean! Castles, caverns, and guide! We were 4 older adults traveling from Trieste. The castle is so much more than castle - it is also built into a cave and hillside. Stunning and historical. The cavern is beyond compare. Immense, gorgeous, the most incredible stalactites and stalagmites. Very well run with a train inside the cavern to go down and up and about a 1.5 mile walk inside. Beautiful in every way. Our guide was knowledgable about all of the area around us, pleasant, well spoken, intelligent, and excellent in every way. We could not have enjoyed it all more!
WOW Experience
Elizabeth W,,Sep 23, 2025
- Review from Viator
5.00
Absolutely great adventure. So many different structures to look at . This is a fairly aggressive walk so make sure you have comfortable shoes and a light jacket. It’s chilly in the cave (55 F).
Amazing experience,
Maria A,,Sep 18, 2025
- Review from Viator
5.00
Thee caves are breathtaking ( bring jacket ). Castle is well preserved and go deep into the rocks. Something you can’t miss!
They take you to the...
Joel I,,Sep 4, 2025
- Review from Viator
4.00
They take you to the places and buy you the ticket, it is something that if you have a car you could do on your own, anyway, they are very friendly people!
Spectacular Cave Experience
Ryan S,,Sep 3, 2025
- Review from Viator
5.00
The cave network is immense and we get to see only a fraction of it, but what we do see in an overwhelming display of massive structures. There are other caves, but this is truly spectacular and truly worth a visit.