Diemelsee, Diemel ReservoirDiemelstausee, Diemeltalsperre - Credit: Wikimedia Commons
The Diemelsee or Diemel Reservoir () is a reservoir with a surface area of 1.65 km² and about capacity of 19.9 million m³ on the River Diemel in the counties of Waldeck-Frankenberg in North Hesse, and Hochsauerlandkreis, Westphalia, Germany. Read more on Wikipedia
Source: en.wikipedia.org