Gräfingründer Teich
Harz District, Germany
The Gräfingründer Teich, also called Grauer Teich is a reservoir near Straßberg in the German state of Saxony-Anhalt. Part of the Lower Harz Pond and Ditch System, it impounds an unnamed stream.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).