The town of Bad Wildbad is about an hour drive from Stuttgart, and is worth a return trip for me! My favorite attraction this time was the beautiful boardwalk up into the trees, followed closely by the return walk on the forest floor.
There are restaurants and snack bars near the tram stop at the top, and plenty of cafes in town. There are also thermal baths, gardens, shops, and hotels. Several other treetop walks can be found in other cities around Germany, which is a fun way to explore nature and see the area from above. Search for “baumwipfelpfad” for several locations. This is not a sponsored post- I just highly recommend it/them.