Cottbuser Ostsee

The Cottbus Eastern Lake (German: Cottbuser Ostsee, Lower Sorbian: Chóśebuski pódzajtšny jazor) is an under development artificial lake on the grounds of the former open-pit lignite mine near Cottbus, Brandenburg. When complete, it is to cover a surface area of 19 km², making it one of the biggest artificial lakes in the country. Flooding started in 2019 but had to be interrupted several times due to low water levels in the nearby Spree River. The lake is to become part of the Lusatian Lake District, a chain of artificial lakes mostly the result of open-pit lignite mining.