The Cospudener See is an artificially constructed lake situated directly on the southern outskirts of Leipzig, Germany. Leipzig, Markkleeberg and Zwenkau have shares in the lake which is on the site of a former open cast mine. The lake is popularly known as "Cossi", more rarely "Cospi", and has become highly popular with the local population, with long stretches of sand beaches and with a sauna directly located at the lake. There is also a small sailing harbor. The lake is a part of the Central German Lake District.

Markkleeberg is an affluent suburb of Leipzig, located in the Leipzig district of the Free State of Saxony, Germany. The river Pleiße runs through the city, which borders Leipzig to the north and to the west.