Selenter See Beach below the park and campsite

The Selenter Lake, which is located near the town of Selent in the Plön district, is on average 14 m deep and lies at an altitude of 37 m above sea level. The lake is drained into the Baltic Sea via the Hohenfelder Mühlenau, which is only 10 km long, to the north and the Salzau to the northwest. The northern part of the Selenter Lake and the surrounding area is a nature reserve.

The lake is also known for its abundance of fish. It is home to eels, perch, pike, and large and small whitefish, as well as large numbers of roach. During the Second World War, the Selenter Lake was used as a seaplane airport due to its long, compact body of water. Its landing point was in Bellin on the sandy beach there, and its staff were housed at the Bellin air base, which was used for around 12 years after the war as a large refugee camp for refugees from Pomerania, Danzig and East Prussia.

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