Available languages
5 hours
Mobile ticket
Visit the Queen of all caves and Explore the magnificent underworld.
The Postojna cave is the only cave where you can take a special train and ride under magnificent underground arches. The enchanting halls will take your breath away and the thrillingly narrow tunnels will raise your heart rate. One of the world's biggest and astounding cave systems is easily accessible to everybody.
Infants are required to sit on an adult’s lap
Not recommended for travelers with poor cardiovascular health
Travelers should have at least a moderate level of physical fitness
Child rate applies only when sharing with 2 paying adults
At time of booking, Cruise ship passengers must provide the following information at time of booking: ship name, docking time, disembarkation time and re-boarding time
A minimum of 4 adults per booking is required
Departure time will be known at the time of booking - check messages via Viator
Operates in rainy weather - have jackets and non lsippery dhoes
German language is only available by arrival of Mein Schiff and AIDA BLU cruise ships
For a full refund, cancel at least 24 hours before the scheduled departure time.
Transport by AC van/minibus/coach
Basic Accident Insurance
Photo-stop at the Predjama castle
Entrance fees - Postojna cave
Port of Koper Pick-up / Drop-off
Licensed Tour guide/escort
Food and drinks
Gratuities
Postojna Cave
With an electric train travelers will visit 24 km long underground Karst system with many galleries, tunnels and magnificent halls. As well there you can observe a human fish.
Predjama Castle
Travelers will do a photo-stop at the Predjama castle. It is the largest cave castle in the world dazzies with its impressive location high in the rocks.
Pickup included
20 reviews
Total reviews and rating from Viator & Tripadvisor
Q5725JFpabloa,
Aug 25, 2025
- Review from Tripadvisor
The visit to the caves was the great disappointment of the whole trip to Slovenia: They have no guides who speak Spanish and we made the mistake of taking the tickets (+140 €!!) with the guide in English. They joined us with +80 people with ONE GUIDE for all (watch, of the 90 minutes of the visit, 45 minutes spend waiting and getting on/off the train that travels the 3.5 km out and back, 15 minutes are kept at the end to ensure that you can spend money in the store that they have inside and in between they spend ONLY 30 MINUTES to walk the 1.5 km of cave that they allow in the visit, making ONLY 3 stops of the guide (who had to wait until they all joined) to give explanations, making the whole run, NO information of what we were seeing and NO time to stop to enjoy the visit. It's very sad considering that we scrolled from afar just to see them, and all to sell more tickets.
Stephen S,
Sep 9, 2024
- Review from Viator
Beautiful extensive caves viewed on train and on foot. 90 minutes including approx. one km of walking in a cool 10c climate
Alain F,
Jul 28, 2024
- Review from Viator
Great guide, beautiful and immense cave and a very comfortable experience! Our kids really enjoyed it and Koper delivered!
rebeccaprzysucha,
Jun 27, 2024
- Review from Viator
What a great tour!! Damien was our guide from Istranka. He was very patient with our group of 35. He's very knowledgeable and did a wonderful job. The caves were AMAZING!!
Sue W,
Jun 26, 2024
- Review from Viator
Train ride through most of the caves. Walking on non slippery surfaces much appreciated. Cave guide was phenomenal!
Charles M,
Nov 14, 2023
- Review from Viator
This was a wonderful shore excursion! The caves were magnificent! It is a must see if you are in Slovenia. Our tour guide was very informative about the area, culture and history. The pick up point was directly off the ship and they were very punctual in returning us to the ship. Definitely would recommend
Enza N,
Nov 2, 2023
- Review from Viator
So pretty and interesting. Definitely lots of walking and chilly. Couldn’t hear the guide but that was part of the cave staff. Very slippery so wear sneakers. The train was an experience but fun and one of a kind
paultU5524ZD,
Oct 6, 2023
- Review from Tripadvisor
We had a sensational day. Our guide Sonja, was knowledgeable, Gracious and considerate. She enhanced what was already a great experience. The caves are an absolute must see and th castle is incredible.
Melissa W,
Sep 20, 2023
- Review from Viator
Very unorganized when I booked tour thought it was for 8:30 in the morning. That was the time tour kiosk opened, tour wasnt until 10:45, was told I was sent a message the day before giving me the time (never received) but how are you going to inform someone the day before of the time? We had other plans later in day which had to be cancel since tour started 2 hrs later then expected. Should inform people of the time when they book not the time you open.
Tobi H,
Aug 23, 2023
- Review from Viator
Great caves. Kids loved them. Not too far from the port. Bus meets you from the ship and returns you there so very handy. Castle was beautiful
Operated by Istranka Tours