If you walk along the river down to the lake you will find a little ferry port on your left side. Boats take you to some of the islands in the lake such as Elba or Ridö. It's a nice way to spend a day or a half.
Björnö is the city's main island. It's easy to find, as there are signs everywhere. It's connected to the main land with a little bridge. There is a nice beach, walking tracks and the possibility to hire kayaks and other boats at Björnögården. In the winter you can rent skies and skates.
Another really nice island is Ãngsö just 15 km out of town. Take E18 West, towards Stockholm till the Airport Exit, from the roundabout just follow the signs saying "Ãngsö". It's a beautiful island with a little castle, a church, a small cafe where you sit right by the water, and lots of hiking and bike tracks through the beautiful landscape. There's tons of space to relax on the cliffs by the water all by yourself, have a barbecue or swim. A must, when you're in town!
