The Water Tower Belvedere is a water tower of reinforced concrete construction in Aachen, Germany, located on the Lousberg hill. It was built in 1956.
The water tower accommodates a revolving restaurant, which reopened in 2005 after being closed for several years. The restaurant revolves once every 56 minutes. Service includes a restaurant, a beer garden and a traditional Sunday brunch.
Wikipedia https://en.wikipedia.org/wiki/Belvedere_Water_Tower
Coordinates 50°47'11.327" N 6°4'49.634" E