Caves of Javoříčko, Limestone cave system in Luká, Czech Republic

Caves of Javoříčko is a limestone cave system located beneath Špraněk Hill near Luká. The system extends for several kilometers and features multiple chambers, passages, and vertical shafts carved from Devonian limestone deposits.

The cave system was discovered in 1938 by a team led by game warden Vilém Švec, though written records about the caves appeared as early as 1873. Exploration and documentation since then have greatly expanded knowledge of this underground formation.

The name "Javoříčské jeskyně" comes from the village of Javoříčko, and tours have run since 15 May 1939. Guides point out the 2-metre sintrová záclona curtain, only 4 to 5 mm thick, and the caves are the largest known winter roost of the common pipistrelle bat in the Czech Republic.

The entrance is about 900 meters uphill from the parking area, so visitors should be prepared for a steep walk. Guided tours of different lengths are available to match various fitness levels and interests.

The best-known formation is a sinter curtain over 2 metres long and about half a metre wide, yet only 4 to 5 mm thick along its whole length. The caves are also the largest known wintering site of the common pipistrelle bat in the Czech Republic.