Ljubljana, Postojna Cave & Predjama Castle from Zagreb

A train carries you through an underground maze of stone before you ever leave the cave.

A full-day guided tour from Zagreb takes you to Ljubljana for a walking tour of the capital's architecture and riverbanks, then underground at Postojna Cave with a train ride through stalactites and stalagmites, and finishes at Predjama Castle built into a cliff. The tour runs 12.5 hours with an English-speaking guide, hotel pickup from Zagreb, and entrance fees to both cave and castle included; food and drinks are separate.

Step-by-step itinerary

Explore Ljubljana, Postojna Cave, and Predjama Castle

• Guided walking tour of Ljubljana
• Visit Dragon Bridge and riverbanks
• Train ride through Postojna Cave
• Guided walk inside Postojna Cave
• Tour medieval Predjama Castle

The Experience

The day starts with pickup in Zagreb and a drive into Slovenia. Once in Ljubljana, a guided walking tour moves through the capital's cobbled streets, crossing the iconic Dragon Bridge and following the riverbanks past Baroque and Art Nouveau buildings and the city's lively squares. The guide handles the history and the architecture while you move at a pace that lets you absorb the place instead of rushing through it.

Postojna Cave is where the tour shifts underground. A train carries you into the cave system first, winding through vast chambers lined with stalactites and stalagmites that rise from the floor and hang from the ceiling. After the train ride, you walk deeper into the cave with the guide, seeing formations the train cannot reach. The cave stays at a steady temperature year-round, but the walk itself is moderate—no climbing or scrambling required.

The final stop is Predjama Castle, built directly into a cliffside about 9 miles from Postojna. The castle's location is its defining feature: a medieval structure emerging from the rock itself, with a hidden cave system running beneath it. An audio guide walks you through the rooms and the legends attached to them—tales of the knight Erasmus and the sieges the castle endured. By late afternoon, the drive back to Zagreb brings the day to a close.

What’s included

• Hotel pickup from Zagreb.
• English-speaking driver and guide for the Ljubljana walking tour.
• entrance fees to Postojna Cave with the guided underground tour.
• entrance fee to Predjama Castle with audio guide.
• standard air-conditioned transportation for the full day.

Good to know

Easy physical levelInfant seats availableNot for pregnant travelersNot for heart conditionsNot for back problems

Operated by To do in Slovenia

Is this one for you?Book this if you want Ljubljana's architecture, Postojna Cave's underground train, and Predjama Castle in one day from Zagreb—choose it only if you're willing to spend the full day traveling and touring rather than exploring a second destination.

Traveler reviews

4.22★★★★★★★★★★

9 verified traveler reviews

Read all the reviews ›

Top questions

What is the Dragon Bridge in Ljubljana and why does the tour stop there?

The Dragon Bridge is Ljubljana's most recognizable landmark, a stone bridge decorated with dragon sculptures that has become the symbol of the city. The guided walking tour crosses it as part of the route through the capital's riverside and central squares, giving you the chance to see the architecture up close and understand the city's layout.

How does the train ride work inside Postojna Cave?

A narrow-gauge train takes you into the cave system on a track laid through the underground passages, moving through the largest chambers and past the most dramatic formations of stalactites and stalagmites. After the train ride ends, the guided portion continues on foot through sections the train cannot reach, showing you deeper parts of the cave network.

Can I walk around Predjama Castle on my own, or is there a guide?

Predjama Castle comes with an audio guide rather than a live guide at the site. You move through the rooms at your own pace, listening to the recorded commentary about the castle's history, the knight Erasmus, and the legends tied to the cliff-built structure and its hidden cave system.

How long is the drive from Zagreb to Ljubljana?

The drive from Zagreb to Ljubljana takes roughly two hours each way. The full tour is 12.5 hours total, which includes the driving time, the walking tour in Ljubljana, the cave exploration, the castle visit, and the return journey to Zagreb.

Is lunch included in the tour price?

Food and drinks are not included in the tour. You'll have time to eat during the day, but you'll need to purchase meals and beverages separately at restaurants or cafés along the route.

What should I wear for a day that includes a cave and a castle?

Comfortable walking shoes are essential for both the Ljubljana streets and the cave walk. The cave stays cool year-round, so bring a light jacket even in summer. The castle is outdoors on a cliff, so weather-appropriate clothing helps; the audio guide means you're moving at your own pace, so you can take breaks as needed.