The Roslagen Maritime Museum is located in Älmsta by the Väddö Canal - a living museum that tells the story of Roslagen's rich maritime history. There is an old skipper's yard, a museum shop, a library and a pier where boaters along the Väddö Canal can moor. The museum is also a popular stop for walkers along the Roslagsleden trail.

Roslagens Sjöfartsminnesförening runs the business and organises traditional events such as Postrodden, Beckbyxans dag and steamboat trips with S/S Elmsta.

In the large boathouse, you can see post-rowing boats, engines, lighthouses, knots and a unique collection of bottle ships.

In summer, the museum is open for guided tours, coffee breaks and sales of the association's yearbook Horse spikes - filled with stories about life at sea and the people along the coast