The Botanical Garden
Nice park, especially during the summer. There's a domed indoor botanical garden as well with free entrance.
Aarhus Botanical Gardens is a botanical garden in Aarhus, Denmark. It is located north of the Old Town open-air village museum and was founded in 1875. Nowadays it covers an area of 21.5 hectares, with 5 hectares for the Old Town.
Beautiful nature, lots of space for ball games and such, plants from all over the world. Great for running as well. Free entrance to "The Butterfly Dome".