Kochbrunnen

The Kochbrunnen (in German: boil fountain) in Wiesbaden is the most famous hot spring in city.

The spring in the Kochbrunnenplatz was first mentioned in 1366 as Bryeborn (Brühborn) and 1536 as Syedenborn (Siedeborn).

The fountain has well water when exiting, at a temperature of 66.1 °C, smells faintly of hydrogen sulphide and has a strong salty taste.

From there it passes into the extensive thermal water system of the city.

It is used both for medicinal purposes (including in the hot springs in Aukammtal), as well as to heat the city hall.