Södertörn is a peninsula located in the eastern part of Sweden, specifically in Stockholm County. It is bordered by the Baltic Sea to the east and the Mälaren lake to the west. The area is known for its diverse landscapes, including forests, lakes, and coastal regions, making it a popular destination for outdoor activities. The region is home to several municipalities, including Haninge, Nynäshamn, and Tyresö. Södertörn also hosts Södertörn University, which offers a variety of academic programs. The area has a rich cultural history, with archaeological sites and historical landmarks that reflect its significance in Swedish heritage.