The cave was accidentally discovered by a local forester during a blasting operation in 1887.
Cave temperatures remain constant at approximately 8 degrees Celsius throughout the year.
Fossilized remains of cave bears, which lived in the region during the Pleistocene, have been recovered from the site.
The cave system extends for a total mapped length of approximately 1,800 meters, though only a fraction is open to the public.
The wildlife park serves as a sanctuary for injured local animals before their potential release.
The cave is notable for its 'stone curtains' and diverse dripstone formations, which are still growing.
The site includes a geological trail that explains the formation of the surrounding Sauerland karst landscape.
Bilsteinhöhlen is a karst cave system located in the Bilstein valley near Warstein, featuring roughly 400 meters of accessible subterranean passages. The site integrates a cave tour with a wildlife park home to red deer, sika deer, wild boar, and lynx. Geologically, the cave is composed of Middle Devonian limestone that formed approximately 380 million years ago. Stalactites and stalagmites remain active within the damp interior chambers. The wildlife park spans several hectares, connected to the cave by walking trails through the valley. Discovered in 1887, the cave retains its natural state without artificial lighting installations in non-tour sections. The surrounding Bilsteintal is a protected nature reserve. The facility is managed as a regional attraction focused on geological history and local fauna.
The main cave entrance portal and the raised observation platforms overlooking the wild boar enclosure.
Bring a sturdy jacket, as the cave temperature is significantly lower than the outside air regardless of the season.
Wear closed-toe footwear with good grip, as the cave paths can be damp and occasionally slippery.
Allow extra time to walk the forest trails connecting the wildlife enclosures beyond the main cave entrance.
Do not attempt to feed the animals in the wildlife park, as specific dietary protocols are strictly enforced for their health.
Open daily throughout the year, but guided tour availability varies by season.
Do not touch the cave formations, as skin oils can stop the growth of stalactites; stay on designated trails in the wildlife park.
