Werdringen Castle complex, surrounded by water, was built in the XIII century and was owned by the local feudal lords. Subsequently, it often changed owners. One of them rebuilt the castle in the Neo-Gothic style and opened a hotel in it in the middle of the XIX century. Today the castle is owned by the government of Hagen, who opened a museum of prehistoric and early period of the history in it, with archaeological and geological finds of the Ruhr area from the XVIII century. Here you can see the remains of ancient insects that lived in these places 318 million years ago, and three swords of the Bronze Age found at the foot of Mount Kaisberg, not far from the castle.