Škocjan Caves

Slovenia's first natural UNESCO World Heritage site (1986): the underground canyon of the Reka River, crossed on foot over dizzying walkways.

The underground canyon of the Reka

This is Slovenia's first natural UNESCO World Heritage site, listed in 1986 — yet most visitors drive straight past on their way to Postojna without knowing it. At Škocjan, the Reka River plunges beneath the Karst plateau, where it has carved an outsized underground canyon whose Martel Chamber ranks among the largest underground chambers in Europe. You cross it on foot, over the Cerkvenik Bridge suspended more than 40 metres above the river, before the Reka continues its invisible journey to Italy, where it resurfaces as the Timavo.

Škocjan or Postojna?

Short answer: Škocjan for grandeur and wilderness, Postojna for family comfort and its underground train. The two sites are only about thirty minutes apart — our complete guide to Slovenia's caves helps you decide, or combine both with Predjama Castle and the Karst.

The visit

Visits are guided and leave from the Matavun visitor centre. The classic route crosses the underground section, then climbs back out through the Velika Dolina, a spectacular collapse doline where daylight pours into the canyon. Photography is forbidden in the galleries: the best pictures are taken outside, on the trail overlooking the chasms.

The cradle of karstology

The word 'karst' comes from the Kras, the plateau surrounding Škocjan — and it was largely here, in the 19th century, that the science of limestone landscapes was built. Collapse dolines, a vanishing river, tunnel caves: the site is an open-air karstology textbook, one of the reasons for its UNESCO listing. The hamlets of Škocjan and Matavun, perched on the rim of the chasms, seem placed there for scale.

Getting there

Divača station, on the Ljubljana–Koper line, is 3 km from the site — seasonal shuttle or a waymarked footpath. By car, Škocjan combines perfectly with Lipica, the Karst villages and a glass of Teran at a local winemaker's.

Photo: Jakub Hałun — CC BY 4.0, via Wikimedia Commons.