300px|right|thumb|The ruins of the old castle Alsnö hus on the island of Adelsö. Adelsö is an island in the middle of Lake Mälaren in Sweden, near Björkfjärden. The island is part of Ekerö Municipality and Stockholm County. It is about by ferry and road west of downtown Stockholm. The administrative center of the important Viking settlement Birka (on the neighbouring island Björkö) was situated at Hovgården on Adelsö. The road network is connected via a ferry link across a narrow strait to the main island of Ekerö.
via Wikipedia infobox
300px|right|thumb|The ruins of the old castle Alsnö hus on the island of Adelsö. Adelsö is an island in the middle of Lake Mälaren in Sweden, near Björkfjärden. The island is part of Ekerö Municipality and Stockholm County. It is about by ferry and road west of downtown Stockholm. The administrative center of the important Viking settlement Birka (on the neighbouring island Björkö) was situated at Hovgården on Adelsö. The road network is connected via a ferry link across a narrow strait to the main island of Ekerö.
==Geography== The Adelsö landscape consists of pine-clad rocky hills and moraine ridges dotted with fields and deciduous trees, mainly oak. The highest spot on Adelsö is Kunsta Mountain, which is 53.2 m above sea level. The top of Kunsta has an outlook tower offering a great view of the middle of Lake Mälaren.
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