Båven () is a

lake A lake is often a naturally occurring, relatively large and fixed body of water on or near the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from ...

in the municipalities of

Flen Flen () is a locality and the seat of Flen Municipality, Södermanland County, Sweden with 6,229 inhabitants in 2010. Flen evolved as a railway junction and got the title of a city in 1949. Since 1971 it is the seat of the much larger Flen Munici ...

Gnesta Gnesta () is a bimunicipal Urban areas in Sweden, locality and the seat of Gnesta Municipality, Södermanland County, Sweden with 6,376 inhabitants in 2020. Gnesta is located in Södermanland, on the border to Stockholm County. As situated near t ...

, and

Nyköping Nyköping () is a Urban areas in Sweden, locality and the seat of Nyköping Municipality, Södermanland County, Sweden, with 32,759 inhabitants as of 2017. The city is also the capital of Södermanland County. Including Arnö, the locality on the ...

Södermanland Södermanland ( ), locally Sörmland, sometimes referred to under its Latinisation of names, Latinized form Sudermannia or Sudermania, is a Provinces of Sweden, historical province (or ) on the south eastern coast of Sweden. It borders Österg� ...

Sweden Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic count ...

. The lake is characterized by branches and many islands, with over 500 km of shoreline. Around Båven there are a number of estates and manors, including Sparreholm, Vibyholm and Rockelstad. The lake has relatively clean water and a rich bird life with many bird protection areas. The lake is one of the few lakes or waterways in Sweden with the presence of

wels catfish The wels catfish ( or ; ''Silurus glanis''), also called sheatfish or just wels, is a large species of catfish native to wide areas of central, southern, and eastern Europe, in the basins of the Baltic, Black and Caspian Seas. It has been intro ...

References

Lakes of Södermanland County {{Södermanland-geo-stub