Motala ström is the river system that drains lake Vättern, the second largest lake in Sweden, into the Baltic Sea in Norrköping. It is named from the city Motala where it begins. In the early 19th century, Göta kanal was constructed as a parallel to Motala ström. Lake Vättern Vättern is the second largest lake (by surface area) in Sweden, after lake Vänern. ... The Baltic Sea is located in Northern Europe, bounded by the Scandinavian Peninsula, the mainland of Eastern Europe and Central Europe, and the Danish islands. ... Drottninggatan, A street in Norrköping Norrköping [ˈˈnɔrʃøːpɪŋ] (population 123 971), is a City and is a Municipality in Östergötland County, in southeast Sweden. ... Motala (population 42,175) is a Municipality in Östergötland County, in southeast Sweden. ... Göta Kanal is a Swedish canal constructed in the early 19th century. ...