The Postojna Cave system is Slovenia's most popular tourist attraction, and within an instant of arriving, it is clear why. The cave, formed by the Pivka River, is a 20 km (12.5 mi) long karst cave, and is the most visited cave in Europe. Enter a ... 

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Certiļ¬ed photos by travelers like you.

postojna castle

August 2012

castle in the hill

Predjama Castle

September 2014

My wife and I are in front of the castle

postojna

August 2012

inside the cave

IMG_8645

April 2011

Predjama Castle

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