Hemer is the rock sea city. The 380 million year old formations are unique and only a walk away from the city. Here in the Sauerland, where the Sauerland-Waldroute and the Sauerland-Höhenflug meet, there is always a lot going on and you can experience Sauerlandpark, Felsenmeer with Heinrichshöhle, the Apricke nature conservation project or fast-paced e-karting.