Postojna Cave & Predjama Castle tour from Koper: Private half-day

Underground train through Europe's largest cave, then a castle built into a cliff face

A private half-day tour from Koper takes you 45 minutes to Postojna Cave, where you board an underground train through a 25-kilometre system of passages and chambers carved over billions of years. After a coffee break, you drive to Predjama Castle, a fortress wedged into a 123-metre cliff for over 800 years, for photos before the return to Koper. The tour includes cave entry, air-conditioned transport, bottled water and a live guide in English, Spanish, Italian, German or another language. It runs about 6.5 hours total.

Step-by-step itinerary

Stops and time spent at each

1. Postojna Cave2h · entry included
2. Predjama Castle15m

Visit Postojna Cave and Predjama Castle

• Drive 45 minutes to Postojna Cave
• Ride underground train in cave
• See cave formations and baby dragons
• Take coffee break
• Drive to Predjama Castle
• Photo stop at Predjama Castle
• Hear story about rubber knight Erazem
• Drive back to starting point

The experience

The drive from Koper takes 45 minutes. Once at Postojna Cave, you board the underground train: the main way visitors move through the cave system. The train carries you past formations that took billions of years to build, and you'll see the famous baby dragons (olm salamanders) that live in the cave's waters. This is the longest cave in Europe, and the train does the heavy work so you can focus on what you're seeing rather than navigating on foot.

After the cave, there's a coffee break to stretch and regroup. Then you drive to Predjama Castle, which sits directly into a 123-metre-high cliff, not beside it, but built into the rock face itself. The stop is for photos. The castle's position and the story of the "robber knight" Erazem who once held it make it one of Slovenia's most photographed sites. The drive back to Koper takes roughly 50 minutes.

Your guide travels with you the whole way and speaks one of five languages. The vehicle is air-conditioned, and bottled water is provided. Children from age 1 are welcome, though infants sit on an adult's lap unless you arrange a specialized infant seat ahead of time.

What’s included

• Postojna Cave entrance fee.
• underground train ride.
• air-conditioned vehicle with pickup and drop-off in Koper.
• bottled water.
• live guide in your choice of five languages.

Before you book

Days and timesEvery dayDeparts at 09:00

AgesAdult (18 and older) · Youth (6 to 17 years) · Child (1 to 5 years)

GroupPrivate

Live guideEnglish, Spanish, German, Italian and Czech

Meeting point and pickupHotel pickup is optional; you can also go straight to the meeting point. Ends back at the starting point.You can choose from 4 pickup points.

Cancellation and refundsFree cancellation up to 24 h before the start. After that, no refund.It may be canceled if the minimum number of travelers isn't reached. If that happens, you're offered another date or a refund.

Prices and times updated 3 days ago

Good to know

Low physical effortInfant seats availablePublic transport nearbyInfants must sit on laps

Operated by Meet the locals in Slovenia

Is this one for you?Book this if you're traveling as a small group or family and want a private vehicle to set your own pace between Postojna Cave's underground train and Predjama Castle's cliff-side views.

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Top questions

What languages is the tour guided in?

Live guide in English, Spanish, German, Italian and Czech.

Can children come?

Yes. Ticket types: Youth (6 to 17 years); Child (1 to 5 years).

How long is the underground train ride through Postojna Cave?

The train carries you through a 25-kilometre system of passages and chambers. The ride itself is the main way visitors move through the cave. The exact duration depends on which sections the guide includes, but it is the centerpiece of the cave visit.

What is Predjama Castle and why is it famous?

Predjama Castle is a fortress built directly into a 123-metre-high cliff, where it has stood for over 800 years. It's known for the legend of Erazem, a "robber knight" who once held the castle, and for its dramatic position wedged into the rock face itself.

Does the tour include lunch?

Lunch is not included. There is a coffee break during the tour, but you'll need to arrange your own meal or eat before or after the tour.

Can I bring a baby on this tour?

Children from age 1 are welcome. Infants sit on an adult's lap, but if you need a specialized infant seat, you can arrange one when you book.

What's included in the price?

The tour includes Postojna Cave entrance, the underground train ride, air-conditioned transport from and to Koper, bottled water, and a live guide for the full 6.5 hours.