SI
Postojna
A vast show cave with its own railway, and a castle built into a cliff nearby
A vast show cave with its own railway, and a castle built into a cliff nearby
Tours start with a train ride into the cave, followed by a guided walk past stalactites, stalagmites and the white “Brilliant” formation. The visit lasts about 1.5 hours.
Bring a warm layer; tickets are timed, so book ahead in summer.
Photo: Jakub Hałun, CC BY 4.0
This blind cave salamander, sometimes called the “human fish”, lives only in underground waters of the Dinaric karst. Some can be seen in the cave.
Photo: Javier Ábalos Alvarez, CC BY-SA 2.0
About 10km away, this castle is built into the mouth of a cave halfway up a cliff. Combined tickets with the cave are available.
Photo: Jakub Hałun, CC BY 4.0
About 30 minutes south, these UNESCO-listed caves have a huge underground canyon carved by the Reka river.
Photo: Jakub Hałun, CC BY 4.0
Try karst specialities such as pršut (air-dried ham), Teran red wine and jota (bean and sauerkraut stew).
There are restaurants near the cave entrance and in town.
Postojna is about 45 minutes by car or around an hour by train from Ljubljana. The cave is a walk of about 20 minutes from the station.
A car or tour is the easiest way to combine Predjama and Škocjan.
Slovenia uses the euro (€). Prices are moderate by Western European standards.
Check current ticket prices.
Caves and a castle.
Tour Postojna Cave in the morning, visit Predjama Castle at lunchtime, and see the Škocjan Caves in the afternoon.
🛂 Entry rules: EES and ETIAS
Slovenia is in the Schengen area, which has two EU border systems for non-EU visitors.
EES (in force): since 10 April 2026 the EU’s Entry/Exit System registers non-EU visitors’ passport details, fingerprints and a photo the first time they enter the Schengen area, replacing passport stamps. Allow extra time at the border on your first trip; later crossings are quicker. EU, EEA and Swiss citizens are not registered.
ETIAS (not yet running): a €20 online travel authorisation for visitors who don’t need a visa, such as UK, US, Canadian and Australian citizens. It hasn’t started and no start date has been confirmed, so nobody can apply yet; ignore websites that offer to “pre-register” you for a fee.
Visa-free visitors can stay up to 90 days in any 180-day period across the whole Schengen area, not per country.
Official information: EU: Travel to Europe (EES & ETIAS) · Reviewed September 2026
The cave is around 10°C year-round.
Timed tickets sell out in summer.
Photography rules vary by cave; Škocjan restricts it.
A car makes it easy to combine sites.
Quick answers for planning time in Postojna.
About 1.5 hours, including the train ride.
Around 10°C all year.
A blind cave salamander found only in the Dinaric karst.
About 10km.
Any time; the cave is open year-round, though summer is busiest.
Planning a wider trip? Our Slovenia travel guide covers getting there, costs, when to go and more.