Bear Cave

The longest cave in the Nienik Mountains, part of the broader Sudeten mountain range, is the Kletno Bear Cave (Polish: Jaskinia Niedwiedzia w Kletnie). It was discovered near the Polish hamlet of Kletno in 1966. It is well-known for its numerous cave bear excavations. Bear Cave is ranked as one of the biggest caves in Poland.

The cave's first 200 meters (660 feet) were discovered in October 1966 while mining in the newly created quarry Kletno III. New passageways were discovered in 1967, including the middle parts of Sale paacowe ("Palace Halls"), and the lowest parts in January 1972. In the years 2014 and 2015, new cave sections were discovered. The cave is currently the longest cave in the Sudetes, with a total length of almost 2 kilometres (1.2 mi).

The cave is located on the right side of the Klenica Valley in the Nienik Mountains, which are a part of the Sudetes. The cave is located at a height of 790 meters above sea level on the Góra Stroma mountain slopes (1,166.8 m).

Inside the cave, abundant bone material from Pleistocene creatures was discovered, especially mammals such as brown bear, cave lion, hyena, wolf, wild boar, and others. Cave bear bones dominated the bone material, accounting for about 90% of all the bones discovered.

Length: 2,000 m

Address: Kletno 18, 57-550 Kletno, Poland