The cave was discovered in 1966 during mining operations in a marble quarry.
Excavations have uncovered thousands of bones from cave bears, lions, and wolves.
The name originates from the vast quantity of cave bear bones found near the entrance.
The cave features rare 'cave pearls' formed by calcium carbonate deposits.
The deepest level of the cave is still actively being explored and is not accessible to the public.
The site acts as a significant wintering ground for several species of bats.
Jaskinia Niedźwiedzia (The Bear Cave) in Kletno is the longest cave in the Sudetes mountain range. It is renowned for its remarkably well-preserved Pleistocene fauna remains, particularly those of the cave bear (Ursus spelaeus). The cave system spans over three levels with a total length of approximately 4.5 kilometers. Visitors traverse a designated tourist route featuring rich karst formations, including stalactites, stalagmites, and draperies. The cave maintains a constant internal temperature of approximately 6 degrees Celsius throughout the year. It serves as an active site for scientific research, particularly in paleontology and speleology. The facility is managed by the Stronie Śląskie municipality. Protection of the delicate microclimate restricts daily visitor numbers, necessitating advanced bookings.
The 'Hall of Palaces' features the most dense concentration of cave formations suitable for photography.
Book your tour reservation online months in advance, as slots fill up rapidly.
Bring a warm jacket and sturdy, non-slip footwear regardless of the season.
Photography is permitted in most areas but requires the purchase of a specific photo permit.
Attempting to visit without a pre-booked reservation, as walk-ins are almost never accommodated.
Closed on Mondays and Thursdays throughout the year; operates on a reservation-only basis.
Touching the cave formations is strictly prohibited to preserve their growth; stay within the marked paths.
