Kellersee

The Kellersee () is a lake in the Holstein Switzerland region of North Germany.
It lies east of the village of Malente on the River Schwentine, has an area of , is up to 27 metres deep and lies at a height of . Southeast of the lake is the village of Fissau in the borough of Eutin.
Management.
The Kellersee is managed by the Schwarten Fishery ("Fischerei Schwarten") who also run a small pub right by the lakeshore.
Water sports and ice skating.
At some points on the lake there are dangerous katabatic winds ("Fallwinde") that are often underestimated and may lead to serious problems. This occurs mainly in the Fissau Bay. At this point, the lake lies between two steep hills, due to its glacial history. In addition, the lake is particularly deep, because the Schwentine enters it here.
The adjacent Mondschein or Stille Bay freezes later than the lake, as does the area around the mouth of the Schwentine. The thin sheet of ice in these areas can be dangerous.