You can find out about the history of Vallsta with a stop at Farmhouses of Halsingland. Take in the museums while you're in the area.
Hit the slopes in Jarvso with a visit to Jarvsobacken. While you're in the area, wander around the parks.
After visiting Galtströms Herrgård, make a plan to see the other sights and activities in Galtström. Take in the museums while you're in the area.