Arresø

Arresø is a lake located at 56°00′00″N 12°04′00″E / 56°N 12.0666667°E / 56; 12.0666667, in the Hovedstaden region just north of Ølsted and east of Frederiksværk on the island of Zealand in Denmark. At 39.87 km² (15.39 sq mi) Arresø is Denmark's largest lake, based on area. The lake runs into Roskilde Fjord through the Arresø Canal in Frederiksværk. The canal was begun in about 1717 by royal command, and the work was carried out by Danish soldiers and Swedish POW's. There are a number of rivers and streams running into the Arresø of which the Pøleå is the most significant. Especially along the lake's west side there are a number of hills and ridges. Among these is Maglehøj in the Frederiksværk and Arrenakke Hills, which offers a...