Available languages
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.
Wheelchair accessible
Infants and small children can ride in a pram or stroller
Service animals allowed
Public transportation options are available nearby
Specialized infant seats are available
Transportation options are wheelchair accessible
Suitable for all physical fitness levels
Cruise ship passengers must provide the following information at time of booking: ship name, docking time, disembarkation time and re-boarding time,
Hotel guests must advise supplier as soon as possible: hotel details
The temperature inside the cave is constant throughout the year (10 °C), so warm clothing and sports footwear are recommended
For a full refund, cancel at least 24 hours before the scheduled departure time.
Driver/guide
Insurance
Hotel/port pickup and drop-off
Food and drinks
Gratuities
Select a pickup point
Koper
Your guide will pick you up at the agreed starting point in Koper, Slovenia - hotel, cruise terminal, bus station, train station etc. (please contact us after the booking so the appropriate arrangements can be made).
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).
Pickup included
5 reviews
Total reviews and rating from Viator & Tripadvisor
Rita M,
Oct 8, 2025
- Review from Viator
There was a lot of stairs and dress warm for the cave experience, but it was awesome! This was a lovely trip!
Kathy S,
May 29, 2025
- Review from Viator
This is not a moderate activity; it is challenging. The guide was nice but was subpar based upon other Viator guides we have had on many other tours.
Paula P,
Apr 29, 2025
- Review from Viator
The bus host Andrea was a nice man. The guide in the cave was extremely hard to hear, but the cave was spectacular! The castle used audio guides in each room and was pretty amazing!
fi33ne,
May 8, 2024
- Review from Tripadvisor
The guide Ernie was very helpful and cheerful. Ernie gave us the relevant info to give us the context to better appreciate the two amazing places (Predjama Castle and Postojna Caves) covered in this tour. The company's pick-up from Piran was very helpful too as the tour started from Koper. I'd strongly recommend Koper Trips. Very service-orientated company. Thank you.
Operated by KoperTrips.com