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Experience two of Slovenia’s most alluring destinations during an afternoon half-day, small-group tour departing from Ljubljana. You’ll traverse the countryside to the Predjama Castle nestled under a natural cliff archway and learn of its legends as you explore the bizarre staircases and chambers. Next the tour journeys to Postojna Cave, home of unusual yet immaculate stalactites and stalagmites. With your guide, you will voyage on a mini-train into its network of caves and caverns which makes up the largest karst cave in the country. This tour is limited to eight people to ensure a quality experience.


  • Half-day Predjama Castle and Postojna Cave tour from Ljubljana
  • Visit Predjama Castle, the world’s largest cave castle, independently or with a guide
  • Admire the ancient stronghold’s artifacts and artwork, and learn about the secret tunnel of Erazem
  • Explore Postojna Cave and get up close to its spectacular stalactites, stalagmites and caverns
  • Ride a mini-train into the 13-mile (21-km) network and tour its highlights with a local guide
  • Numbers limited to eight people, ensuring a small-group experience with personalized attention from the guide

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What You Can Expect

Predjama Castle and Postojna Cave Tour from Ljubljana

Visit the magnificent Postojna Cave on this half-day tour

After meeting your guide at your central hotel in Ljubljana buckle-up in your air-conditioned minivan for a half-day tour of Predjama Castle and Postojna Cave. Cruise the Slovenian countryside for about an hour before you approach the mouth of a cave where the Predjama Castle is wedged into the cliffside.

With your guide or on your own, begin your adventure through the labyrinth of staircases. Stop in different chambers and see antique furnishings and historical armaments. Discover the the legend of Erazem Predjama, owner of the castle in the 15th century, who used a secret tunnel to collect supplies, mostly cherries, while the castle was being endlessly attacked.

An hour or so later meet with your group and journey 15 minutes to Postojna Cave. Hop aboard the electric mini-train and voyage into this cave along a rail system built in 1872. Learn about how calcites, stalagmites, and stalactites were formed by the Pivka river in this 20-km (13-mile) network of caves. Then delve into the interesting biology that resides here cumulating 100 different species. Hear about the blind salamanders locally referred to as “human fish” that wander the subsurface rivers within.

After about 1.5 hours, emerge from the caves and hop back into your mini-van for a leisurely ride back to your Ljubljana hotel.

Customer Reviews

Jeffrey H

5 star rating: Highly Recommended November 2016

Great tour and guide


5 star rating: Highly Recommended October 2016

This was a fantastic tour. The castle was amazing, built right into the rock wall of the mountain. The cave was truly incredible. First we took a train ride about a mile in and then the tour began. I've never been so deep underground before! The cave tour was good. Especially great, though, were our Viator guides. So enthusiastic, so happy to share all they knew, so happy in general. We had a fabulous day and I highly recommend this tour.


5 star rating: Highly Recommended October 2016

Postojna was very busy but beautiful and it was lovely to see the olms down there. Predjama castle was fantastic and it was really interesting to learn about the history and myths surrounding the castle and its owners.

Miki Y

5 star rating: Highly Recommended September 2016

Excellent. Good value for money.

Igor G

5 star rating: Highly Recommended July 2016

It was amazing! We were very happy with everything.


5 star rating: Highly Recommended July 2016

Very historical and legendary

Matthew B

5 star rating: Highly Recommended June 2016

Great tour, great guide. Patricia was amazing. Highly recommended.

Liz T

5 star rating: Highly Recommended June 2016

Wonderful tour guide and great activity. Great addition to our trip.

Janet H

5 star rating: Highly Recommended June 2016

What a lovely day. Well worth going on this trip. The Castle was in a lovely setting and the sunshine actually appeared as we walked down from the Castle. The caves were fascinating and the train trip was really good. Our guide Sanda was lovely - very knowledgeable and very patient with us older English people. A great day.

Barbara W

5 star rating: Highly Recommended December 2015

This is a first rate trip. The caves are absolutely amazing. Definitely a must see.

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