Wikipedia
Vansjø
Vansjø is a lake in the municipalities of Moss, Råde, Rygge, Våler in Østfold county, Norway. The lake is fed by the river Hobølelva. The lake has an area of 36.9 km² and an estimated coastline of about 250 km. Etymologically the name likely derives from "Varna sjor", the ancient name of the municipality of Rygge.