Postojna Cave & Predjama Castle - Small Group Tour from Trieste

Highlights

Inclusions

Itinerary

1. 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).

   Passes by

2. 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 hAdmission included

3. The Predjama Castle reigns over the surrounding area, not far from the Postojna Cave, in the idyllic village of Predjama. This picturesque, magnificent, defiant, mysterious and impregnable castle has been perched up in the middle of a vertical 123-meter high cliff for more than 800 years. Its romantic appeal is further emphasized by the idyllic Lokva River, which disappears into the underground world deep down below the castle. As the only preserved cave castle in Europe, the Predjama Castle offers a unique insight into the building techniques and resourcefulness of people in the Middle Ages, who were looking for and found a safe harbor for themselves right at the entrance into the cave. During a siege that took place in the 15th century, the castle provided a refuge for its best known and most notorious owner - Erazem of Predjama. The legend about the courageous robber baron Erazem, who remained undefeated until one of his servants betrayed him, is still in people’s minds, inspiring and alluring as ever. It was this safe abode of his which helped the brave knight resist the besiegers without much difficulty for more than a year.

   1 hAdmission included

Cancellation

Free cancellation up to 24 hours before the experience starts, for a full refund.

Reviews

Ratings come from 54 reviews collected by our booking partner. They are travellers' own words, in the order they were written — never reordered to flatter the experience.

Showing reviews written in English.

• 5It is beautiful and the...

  It is beautiful and the train ride is very cool. It is quite cool so bring a jacket to keep warm and good shoes as the pathway is wet.

  Eric_ASeptember 2026via Viator

• 5Amazing

  Cave and castle both must see in Slovenia. Trip left us speechless. Stefan our tour guide had good knowledge about history and we spent nice time. Definitely i will recommend this trip to everyone who wants to visit Slovenia.

  Ewa_MAugust 2026via Viator

• 5Great Cave Tour

  We did not expect such a great tour of this amazing cave. It was not only one of the largest caves we ever experienced, but equally beautiful as well. The tour guide did an amazing job explaining all the details.

  Joel_RJuly 2026via Viator

• 5The Postojna Cave & Predjama Castle - Small Group Tour from Trieste

  The Postojna Cave & Predjama Castle - Small Group Tour from Trieste was even better than we imagined! The Predjama Castle was absolutely incredible—built right against the wall, it’s a sight to behold. There were lots of stairs to climb, but we loved the architecture. The Postojna Cave was truly spectacular. Stephan, our driver, was so friendly and shared his knowledge of the region with our group.

  Juliet_MJuly 2026via Viator

• 5Wonderful day.

  It is a wonderful day, lots to see. There is lots of walking in the caves, up hills and down but not too strenuous. The castle through is built into the side of a cliff so lots of steps. Mia was a wonderful guide for the day.

  june_mJune 2026via Viator

• 5sLOVEnia!

  Beautiful, but lots of stairs, some very steep. The portion of Slovenia we saw was gorgeous. Will plan on returning.

  Donald_LJune 2026via Viator

Know before you go

How it compares in Trieste

• Its from-price is 24% below the median of the 47 day trips we list in Trieste.
• Its length is typical for the group.
• By number of reviews it ranks 5 of 47.
• The operator lists free cancellation on it.

About Trieste

Trieste is an Adriatic port on Italy's border with Slovenia, a city of Habsburg-era palaces, old coffeehouses and a great square that opens onto the sea.

Trieste was the Roman town of Tergeste and became the main seaport of the Habsburg empire after it was declared a free port in 1719. Its grand centre dates from that period: Piazza Unità d'Italia, a vast square of palaces with one side open to the water, the Canal Grande, a short canal lined with cafés and a church, and the grid of the Borgo Teresiano. Above the old town, the cathedral of San Giusto and a castle crown a hill, with a Roman theatre below.

Top-ranked sights in Trieste: Piazza Unità d'Italia (Piazza Grande), Miramare Castle (Castello di Miramare).

See all 209 experiences in Trieste