Termy Mszczonów

Mszczonów, a small town in the Masovian Voivodeship roughly 40 km southwest of Warsaw, taps a deep Lower Cretaceous aquifer through a borehole reaching 1,602.5 metres. The water that reaches the surface at 26–34°C is distinctively low in salinity for a Polish geothermal source, marketed locally as 'słodka woda termalna' (sweet thermal water), and is used both to heat municipal buildings and to supply the Termy Mszczonów pool complex, which opened to the public on 28 June 2008. The facility combines geothermal bathing with slides, a salt grotto, sauna and jacuzzi, and doubles as a winter ice rink, making it one of the more accessible geothermal day-trip destinations for residents of the capital region.