Kvarnsjön nature preserve
The trees around lake Kvarnsjön are old, very old. Some of the pine trees are probably over 150 years old.
Here, in this preserve a small distance north of the city centre, you will find old trees and lots of blueberries. The reserve is a popular retreat for many locals in the area and you will probably meet quite many out for a "forest shower".
There is a path around the lake of about 1.5 kilometres, but there are lots of other paths and trails in the area to explore.