Storsjöodjuret
In Swedish folklore, the Storsjöodjuret (Swedish pronunciation: [ˈstûːrɧøːʊˌjʉːrɛt], literally "The Great-Lake Monster") is a lake monster said to live in the 90-metre-deep (300 ft) lake Storsjön in Jämtland in the middle of Sweden. The lake monster is first attested in a 1635 manuscript, according to which the sea/lake serpent (sjöorm) was bound up magically in the lake's depths by Kettil Runske who carved his spell into the Frösö Runestone (Frösön being an island in this lake).