Rold Skov is one of Denmark's largest forests, a wide, old woodland south of Aalborg with springs, beech trees, heath, and walking routes around Rebild. It is the kind of place that reminds you Denmark is not only coast and tidy towns.
The forest works best as a half-day trip with a car or careful bus planning. Start at the visitor centre in Rebild if you want maps and a sensible first route into the woods.