The Klostersee is a 55-hectare lake in the Brandenburg town of Altfriedland in the Märkisch-Oderland district. It is named after the former Cistercian monastery Friedland, which was on the east bank and to which it belonged in the Middle Ages.
The Dolgensee is a 25 hectare lake in the nature park Märkische Schweiz belonging to Ringenwalde, a district of the municipality Märkische Höhe (MOL). The natural water lies in the …