"Goslar, Lower Saxony Province, Germany51.816910.336 The Upper Harz Water Regale (German: Oberharzer Wasserregal) is a system of dams, reservoirs, ditches and other structures, much of which was built from the 16th to 19th centuries to divert and store the water that drove the water wheels of the mines in the Upper Harz region of Germany." . . . .