Schwarzsee

Schwarzsee or Lac Noir, is a small lake in the Canton of Fribourg, Switzerland with an area of 0.47 km2 (0.18 sq mi). The lake in the Swiss Prealps is bordered by the peaks of Schwyberg in the West, Les Reccardets and Spitzfluh in the South, as well as Kaiseregg. (Wikipedia)