Postojna Caves and Predjama Castle Tour: Explore Slovenia's Top Attractions from Koper

Embark on a 6-hour tour from Koper to explore Slovenia’s top attractions, the Postojna Caves and Predjama Castle. Discover the unique underground systems of the caves and step back in time at the medieval castle. Dress comfortably and get ready for an unforgettable excursion!

Duration: 5 hours
Cancellation: 24 hours
Highlights
  • Postojna Cave - Prepare yourself for Slovenia’s most visited attraction. The Postojna Caves are a stunning underground network featuring exquisite chambers, halls, galleries, stalactites, and stalagmites. Part of your visit includes a breathtaking train ride, while the majority of the tour allows you to explore the underground landscape on foot,…
What's Included
  • Predjama Castle photostop
  • Transportation with AC van/minibus/coach
  • Driver/guide
  • Port pickup and drop-off
  • Entrance fee to Postojna Cave
What's Not Included
  • Food and drinks
  • Gratuities
Additional Information

In this 5-hour tour, you’ll explore Slovenia’s top attraction! The Postojna Caves are unique not only in Slovenia but also in Europe. Discover the captivating underground systems and learn about this natural wonder. You’ll enter and exit the cave on a small electric train, with a walking tour in between.
Just a short drive from the caves is another…

Location
KoperTours
Potniski terminal
Look for the guide standing next to the ORANGE beach flag on your right-hand side as you exit the terminal building on the pier.
Cancellation Policy

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

Customer Ratings
4.9
(45 Ratings)
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Lisa_s
Oct 17, 2025
Must see! - Dress in layers. It is a out 50 degres Fahrenheit. So glad we went for our one day cruise port. The guide had a large bus and was standing next to a faded yellowish light orange flag near cyclone fence. The bus ride was nice...she gave facts about Slovenia. The caves are well run and if you have trouble walking they will let you remain on the open air train to go into the cave and back out. If you are in a wheel chair you could do it too...double check if they can when you onto the train. There are handrails throughout with no steps within the cave system. Smooth concrete pathways too. It is also well lit which they boast about with their audio guide. It comes in various languages. The tour first has about a fifteen minutes open air train ride. If you are really tall watch your head on the train ride. Then, there is about a 45minute walk with an audio guide. Ceilings are very high generally and well lit. It does have some humidity. Beautiful sights to see. Well worth seeing. Handrails throughout. Then it's back on the train for about 15 minutes to get back out. The bus and guide were ready when they said. There are obvious restrooms there too. These were the best caves we ever went into. I highly recommend seeing them. We also went to lake bled before....but if you had to choose one excursion the caves I recommend seeing first.
Review provided by Viator
Mandigaffer
Oct 17, 2025
Great experience! Highly... - Great experience! Highly recommend for anyone visiting the area. Bus was comfortable and tour guide was very knowledgeable.
Review provided by Viator
Jacqueline_k
Oct 16, 2025
Level of exercise - If you have any mobility issues this is not for you! The description never said anything about walking uphill and down in the cave. I think everyone should know that so they know! It should have been rated hard!
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Betsy_r
Sep 30, 2025
Very well organized,... - Very well organized, comfortable bus ride to cave and castle. Helpful and knowledgeable tour guide..
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Linda_m
Sep 26, 2025
Fantastic experience - Amazing! Totally exceeded our expectations Our guide Rastka was very knowledgeable about the history of the caves and the region. The caves were unbelievable! The train took us down to the main area so that we could walk around at our own pace. It was beautiful.. almost indescribable. Highly recommend!
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Edhongo7555
Sep 26, 2025
Nice Caves - My tour guide (Rasa) was super nice. She explained a lot of history of Koper. Very pleasant and informative. The caves were amazing (10 degrees colder than ambient, so bring a jacket)
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Karina
Sep 26, 2025
Best value and amazing sights - An amazing tour. We did this off our own planning from our cruise. It was perfect. Our guide was super informative along the way from the port to the caves and castle. The caves are absolutely amazing!!
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Alina_c
Sep 25, 2025
Amazing caves - Amazing! A fantastic experience riding on the train which had a little bit of speed but not a like a roller coaster. A good part of the tour is walking up and down slopes on wet paved walkways but still very safe with railings to hold onto. Walk at your own pace. As for the tour operator, it’s probably a shorter drive to take it from Trieste instead of Koper. Wished we had more time and went into Predjama castle because it’s different than other castles. Leave some time to visit Koper old town
Review provided by Viator
Cydrial97
Sep 22, 2025
Excellent Service - Excellent excursion. The Nero guide was perfect. Times were as necessary and transfers well coordinated. The cave is spectacular and the castle very nice
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Joshua_h
Sep 20, 2025
Organized, Informational, Mystical - As you walk on the bus, you feel welcomed. Andi is a masterful spokesperson for the Slovenia culture and also takes time to meet guests personally during your ride to the caves/castle. Regarding the caves/castles themselves, you'll never see anything like either of these. Cliffside castle has a unique history and caves are grand with a train underneath that feels like Hogwarts. The full trip was worth every penny and recommend it. And did I mention that the caves have 100 year old "baby dragons"?
Review provided by Viator