Adelsö is an island in the middle of the lake Mälaren in Sweden near southern and northern Björkfjärden. The administrative center of the important Viking settlement Birka (on the neighbouring island Björkö) was situated at Hovgården on Adelsö. Birka and Adelsö form a UNESCO World Heritage Site.
The Adelsö landscape consists of pine-clad rocky hills and moraine ridges varied with fields and beautiful leaf trees, mostly oaks. The highest spot on Adelsö is Kunsta mountain with its 53.2 m above the sea level. The top of Kunsta mountain has a beautiful outlook tower which offers a great view of the middle of lake Mälaren.
The permanent residents is around 700 people, a number that has been quite stable through out the centuries. Most of the working force today commute to Stockholm but there are also a lot of farmers and a couple of active fishermen. During the summer months, a lot of summer guests comes to the island, making its atmosphere more lively.
The communications to Adelsö are very good. Busses (line 311 and 312) start out from the bus terminal Brommaplan in the middle of Bromma and goes to the ferry berth Sjöängen on Munsö. Buss number 312 takes the ferry and goes around the whole island. The ferry goes every half hour during the days and every hour during the evenings and nights. The night ferries goes more seldom during the summer months.