Kostanjevica Cave

Kostanjevica Cave (Kostanjeviška jama) is a fascinating natural attraction just outside the historic town of Kostanjevica na Krki, Slovenia. Discovered in 1937 after a surge of underground water fractured the rock and revealed its entrance, the cave has since become a favorite destination for nature lovers and curious travelers alike. Its winding passages and impressive chambers offer a cool, mysterious escape beneath the rolling hills of Lower Carniola.

The cave is open to visitors from April 15 to October 31, with guided tours available on Saturdays, Sundays, and holidays, and daily during July and August at 10:00, 12:00, 14:00, and 16:00. Tours last about 40 minutes and take you through a well-lit underground world of stalactites, stalagmites, and other remarkable formations. The constant temperature inside the cave makes it a comfortable outing even on the hottest summer days.

Kostanjevica Cave is easily accessible and suitable for families, with pathways and lighting installed to ensure a safe and enjoyable experience. Along the way, guides share stories about the cave’s discovery, geology, and the unique ecosystem that thrives in its depths.

After your visit, you can explore the nearby town of Kostanjevica na Krki, known for its Cistercian monastery and vibrant cultural scene. Whether you’re an avid caver or simply seeking a memorable adventure, Kostanjevica Cave offers a glimpse into Slovenia’s hidden underground wonders.