In the former convent of the Ursulines located Haus der natur (natural history museum). The museum exposition is presented thematically. "Sea World" - a giant aquarium, where the living conditions are recreated various sea creatures. "Reptile Zoo" - the 33 aquariums with various representatives of the snake world. Other rooms are called "Man and animals in fairy tales and myths", "Space", "Forest animals" and others. There is even a room with equipment for the extraction of gold and a collection of precious stones and minerals.