Lake Plau as part of the Mecklenburg Lake District is the seventh largest lake in Germany with an area of 38.4 km². It has connections via the Elde River to Lake Fleesensee, Lake Kölpin and Lake Müritz in the east and to the Elbe River in the west.
Around the lake there are many tourist facilities, such as the campsites located on the eastern and northern shores, near the town of Plau and on the island of Plauer Werder in the north. The lake is surrounded by a (largely still unpaved) circular bike path. The northwestern part of the lake is located in the nature reserve north shore Plauer See.