Key information
- Cave length
- 24 km of galleries
- Visitors
- Over 39 million since 1818
- Cave temperature
- 10 °C year-round
- Tour duration
- ~1h30
- Predjama Castle
- 10 km away, built into a cliff
Postojna Cave is the largest karst cave system open to the public in Europe, with 24 km of galleries. Nearby, Predjama Castle is built into a 123 m cliff face.
Comments
Location
45.7828°N, 14.2047°E
FREQUENTLY ASKED QUESTIONS
How long is the Postojna Cave tour?
About 1h30: 10 min underground train ride in, 1h guided walking tour, 10 min train back. Temperature is 10°C year-round — bring a jacket.
Can you visit Postojna and Predjama in one day?
Yes, that's ideal. The cave in the morning (book the 10am slot), Predjama Castle in the afternoon (10 km away). Allow half a day total. A combined ticket is available (~€40 adult).
What is the olm (proteus)?
The olm (Proteus anguinus) is a unique amphibian endemic to karst caves. Called 'baby dragon' by Slovenians, it's blind, pale pink and can live 100 years. You can see them in the cave.
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