MACH' BLAU is the municipal sport and family pool of Denzlingen, just north of Freiburg, reopened in May 2010 with a new concept. Alongside swimmer and non-swimmer pools, a year-round outdoor pool and a summer open-air pool with a wave slide and a 10 m tower, it has a wellness and sauna area with a herbal sauna, a Finnish sauna and a steam bath, plus experience showers. The municipality pitches it as sauna for the parents while the children use the slides.