Going by the motto ‘he who swims outdoors stays fit’, the Sonnenbad (literally sunbaths in English) is the only outdoor pool in Germany that is open from March to November. In addition to a pool with a slide and a children’s paddling pool, it offers a swimming pool that is 50 metres long and 15 metres wide. All pools and the changing rooms are heated as necessary depending on the time of year; at colder times, they are heated to 28°C.