Södertörn

thumb|Södertörn

Södertörn is a roughly triangular peninsula and artificial island in eastern Södermanland, Sweden, with an area of 1,207 km² and is bordered by: Lake Mälaren, the Hammarby Canal and the inlet of Saltsjön (a part of the Baltic Sea) to the north, The Baltic Sea (the Stockholm Archipelago) to the east and the south, Himmerfjärden and Hallsfjärden (parts of the Baltic Sea) to the west as well as The Södertälje Canal to the northwest.