Day Trips from Piran to Postojna Cave

Visit Postojna Cave, the best-known cave in the world, and The Predjama Castle, the only preserved cave castle in Europe.

Experience the highlights of Slovenia on a scenic tour to spectacular Postojna Cave. Stroll through Ljubljana's historic streets, stories and relaxed riverbank side before discovering one of Europe’s most famous cave systems. Ride the underground train, admire breathtaking rock formations, and explore the fascinating underground world of Postojna Cave on this unforgettable cross-border adventure.

Slovenia is a compact country so you can see a great deal in one day. Skip the self-drive stress with this private full-day tour from Istria, near the Italian border. Whether your tastes run to wine tastings, Lipizzaner horses, or Instagram favorites such as Lake Bled, your private driver will deliver: pay as you go for food and tickets.

Get off the boat and spend a day in the Slovenia with this private full-day shore excursion to Postojna Cave and Ljubljana from Koper. An experienced local guide will meet you at port and take you one of the country’s best natural wonders, like karst caves, full of cavernous rooms and halls. After spending time exploring the cave system your tour will continue on to the marvelous city of Ljubljana, Slovenia’s capital and a city ripe for exploring. Make stops at the Franciscan Cathedral, the fountain of Francesco Robba and Town Hall, among other places. You’ll have time to explore the city and do some shopping before driving back to port.

Predjama Castle and Postojna Cave sit within a few miles of each other in the Slovenian countryside, yet most visitors only make it to one. This small-group tour from Ljubljana covers both—starting with the 13th-century castle built into a cliffside cave, then descending underground at Postojna for a narrow-gauge train ride through the cave's vast chambers.

A Slovenian Karst classic awaits! Explore two of Slovenia's most stunning treasures: Postojna Cave, Europe’s most visited cave, and Predjama Castle, the world’s largest cave castle. Begin with Postojna Cave, a 24 km (15-mile) underground marvel featuring breathtaking stalactites, stalagmites, and a magical electric train ride through its winding passages. Spot the rare "human fish," a symbol of the cave's unique biodiversity. Just nearby, Predjama Castle rises dramatically from a sheer cliff face. This 13th-century fortress blends nature and history, with grand halls, secret tunnels, and legendary tales of knight Erasmus. Enjoy spectacular views and capture unforgettable moments of the surrounding landscape. Together, these iconic landmarks offer an adventure combining nature's wonders with Slovenia’s rich heritage. Flexible tours cater to your needs, promising an experience as memorable as the journey itself!