If Stuttgart is rich in anything (not counting Mercedes and Porsche), then it is in parks. Three parks, connected by bridges, with ponds, fountains and playgrounds, stretch for 3 km from the city center to the Neckar River. I would call this place a paradise for runners, but there are so many birds walking along the paths that it is almost impossible to run in clean running shoes. In the park area there are several mineral springs on which thermal complexes are built.
For the best experience view this post on Liketu