Škocjan Caves, a UNESCO World Heritage site since 1986, features the world's largest known underground canyon, measuring 2,000 meters in length. Admission costs €16 for adults and €8 for children, with guided tours available in multiple languages. The average temperature inside the caves is around 12°C year-round.

Published: 10/27/2025
Last Published: 10/29/2025
Updated: 5/29/2026
Reading time: 8 minutes
Group of tourists with helmets walking along a path inside Škocjan Caves with sunlight streaming through cave opening

Škocjan Caves: A Complete Visitor's Guide

Škocjan Caves, a UNESCO World Heritage site since 1986, features the world's largest known underground canyon, measuring 2,000 meters in length. Admission costs €16 for adults and €8 for children, with guided tours available in multiple languages. The average temperature inside the caves is around 12°C year-round.

Marcus Cent
Updated May 29, 2026
8 min read
Marcus Cent

Marcus Cent

Marcus Cent's connection to Slovenia goes back further than most — he first came to Piran as an unborn baby, and it's stayed a special place for him ever since. He writes VisitSlovenia.com's guides from that long familiarity, and he'll happily argue Piran is one of the very best places anywhere for summer sea swimming: easily accessible, and gloriously refreshing once you're in.

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Škocjan CavesSlovenia travel guideunderground cavesUNESCO World Heritagenature attractions Slovenia

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