Birch Island Björkö

28km/18mi west of Stockholm, in Lake Mälar, lies the little island of Björkö (Birch Island). During the Viking period Björkö was a trading station, with a population in the 10th century of some 1,000 craftsmen, merchants, peasants and slaves. Here too, about 830, St Angsbar preached the Gospel.

In summer there are boat services from Stockholm and Södertälje to Björkö.