A Journey Into the Depths of Postojna Cave

Postojna Cave is famous for its unique underground railway, which takes visitors deep into the heart of the cave system before continuing on foot along beautifully illuminated pathways. As you travel through tunnels and chambers, you will witness extraordinary rock formations created drop by drop over thousands of years. Massive columns, delicate curtains of limestone, and crystal-like structures surround you, creating a surreal environment that feels almost otherworldly.

One of the most iconic residents of the cave is the mysterious olm (Proteus anguinus), also known as the “human fish.” This rare amphibian lives entirely in darkness and has adapted perfectly to the underground environment. Observing this fascinating creature offers a glimpse into the delicate ecosystem hidden beneath the surface and highlights why Postojna Cave is not only a tourist attraction but also an important scientific site.

The Magic of the Underground World

Walking through Postojna Cave is a sensory experience — cool air, soft lighting, and the echo of dripping water create a peaceful yet dramatic atmosphere. The cave maintains a constant temperature throughout the year, making it a refreshing escape during hot summer days and a unique destination in every season. Guided tours provide insight into the geological processes that formed the cave as well as the stories of early explorers who first revealed its hidden beauty to the world.

Visitors of all ages can enjoy the well-maintained paths, which make the experience accessible while still preserving the natural environment. Every section of the cave reveals a new perspective, from towering halls to intimate passages filled with delicate formations. The combination of adventure and comfort makes Postojna Cave one of Slovenia’s most popular and memorable attractions.

Predjama Castle – A Fortress in the Cliff

Only a short drive from the cave stands the extraordinary Predjama Castle, dramatically built into the mouth of a towering cliff. This medieval fortress is one of the most unique castles in the world, blending natural rock formations with human architecture. Its history is filled with legends, most famously the story of the rebellious knight Erazem of Predjama, who is said to have used hidden tunnels to outsmart his enemies.

Exploring the castle allows visitors to step back into medieval times. Narrow staircases, secret passages, and rooms carved into the rock create a sense of mystery and adventure. From the outside, the view of the castle rising above the surrounding forest is truly breathtaking and offers fantastic photo opportunities in every season.

Two Iconic Attractions, One Unforgettable Experience

Combining Postojna Cave and Predjama Castle in a single visit provides a perfect balance between natural wonders and historical exploration. Many travelers choose this excursion as a highlight of their Slovenia itinerary because it showcases the diversity of the Karst region — from deep underground landscapes to dramatic cliffside architecture.

The area surrounding the cave and castle also offers scenic views, local restaurants, and peaceful countryside, allowing visitors to relax and fully enjoy the day. Whether you are traveling as a couple, with friends, or as a family, this experience offers something for everyone: adventure, history, and awe-inspiring scenery.

An Epic Slovenian Adventure

Two unforgettable sights, one epic adventure — Postojna Cave and Predjama Castle represent the perfect introduction to Slovenia’s hidden natural and cultural treasures. From the mysterious underground world and its rare inhabitants to the legendary fortress perched in stone, every moment feels like stepping into a story. Don’t miss the chance to explore one of Slovenia’s most iconic destinations and discover why this region continues to captivate visitors from all over the world.

Duration: only Postojna Cave – 5 hours / both sights- 7 hours
Departure: on request from Bernardin / Portorož / Piran/Izola/ Koper  
Cave entry: guided tour – approx. 1.5 hours  (including the ride with the underground electric train)

Predjama castle: tour with the audioguides – approx. 1 hour
Pick-up times: agreement with the driver/ guide

Transfer price ONLY Postojna caves: €180 (1–3 people), € 210 ( 4 people), € ON REQUEST (5 – 8 people) 

Transfer price Postojna caves & Predjama castle: € 220 ( 1- 3 people) , € 250 (4 people),  € ON REQUEST (5 – 8 people)

Not included: Entrance ticket to the cave & to Predjama castle (we reserve in advance if transfer is booked)