Stadtsee, Uckermark Lakes Nature Park

Stadtsee is centrally located in the urban area of Lychen in the northeast of the state of Brandenburg. It is the center of the Lychen Lake Cross, which consists of seven lakes; it is directly connected at its western end with the Great Lychen Lake and the Oberpfuhl in the east. The elliptical lake is a little over 900 meters long and a little over 350 meters wide. The summer visibility depth is 1.3 meters.

The lake drains via the Woblitz to the Havel. It is also part of the federal waterway Lychener Gewässer, which begins at its eastern end.

The city lake belongs to the Uckermark lakes. To the west and south, the Fürstenberg/Havel-Lychen-Templin trolley line runs past it.