What is "annsjon"

Ånnsjön is a lake in Åre Municipality in Jämtland County, Sweden. By road it is located northwest of Östersund. The lake and surrounding wetlands are rich in fish, water birds and other wildlife. There are remains of human habitation in the region since the stone age, including petroglyphs that are among the oldest in Sweden. In the late 19th century there were attempts to drain the wetlands for use in agriculture and forestry, but this is now being reversed. The lake and surroundings is a protected Natura 2000 area, and attracts many birdwatchers.