Guided tour

From Koper: 5-Hour Tour to Postojna Cave & Predjama Castle

Activity provider: KoperTours
Guided tour

From Koper: 5-Hour Tour to Postojna Cave & Predjama Castle

Activity provider: KoperTours

From US$ 59.23 per person

Discover the underground chambers in the largest cave system in Slovenia on a guided tour and ride on the electric train. Stop at the unique Predjama Castle for a striking photo-op.

About this activity

Free cancellation
Cancel up to 24 hours in advance for a full refund
Reserve now & pay later
Keep your travel plans flexible — book your spot and pay nothing today.
Covid-19 precautions
Special health and safety measures are in place. Check your activity voucher once you book for full details.
Duration 5 hours
Check availability to see starting times.
Live tour guide


  • Explore Postojna Cave and discover a breathtaking underground world
  • Marvel at the unique Predjama Castle and get some stunning pictures
  • See baby dragons, the cave's olms, an endangered species, which can be found only in few places
Full description
Enjoy a 5-hour guided tour to the incredible Postojna Cave with a photo stop at the largest cave castle in the world, Predjama Castle. Explore the extensive Postojna cave system with cave passages over 20 kilometers (12 miles) in length on an unforgettable underground train ride.  The Postojna Cave system is the largest known cave system in the country and the second-largest accessible to visitors in the world. Postojna Caves lie under the slopes of a broad karstic limestone plateau on the eastern fringes of the Postojna basin and offer a unique opportunity to spot some of the local wildlife that lives in the cave. Just ten minutes far away from Postojna caves is Predjama castle, another jewel of the Karst region. Predjama Castle pressed into a huge cavern hollowed out of the high, flat rock face, above the karstic swallow hole of the Lokva stream. The castle boasts as the largest cave castle in the world. It is a truly unique sight and will make for an unforgettable sight, not to mention a great photo opportunity.
  • Predjama Castle photo stop
  • Predjama Castle Entry Fee
  • Postojna Cave Entrance Fee
Not suitable for
  • People with claustrophobia

Select participants and date



Meeting point

Arrive 15 minutes before the activity starts. Find the blue tour booth under the green umbrella. Look for the bus with the sign of the tour.

Open in Google Maps ⟶
Important information

What to bring

  • Passport or ID card

Not allowed

  • Sandals or flip flops
  • Shorts
Customer reviews

Overall rating

5 /5

based on 1 reviews

Sort by:

Traveler type:

Star rating:

The guide was really good and informative. He was polite, helpful and friendly. Would recommend booking with this tour. It was nice to see one of the best caves in the world. Don’t forget to bring warm clothes with you as the temperature inside the cave is around 10 degree.

July 24, 2022

Product ID: 389410