Stuttgart is fond of its mineral springs, the biggest in Western Europe. The best one might be the Leuze Mineralbad which also offers a sauna, but there are many others like the Höhenfreibad Killesberg (open-air pool for €4.10) or the Mineralbad Berg.
© OpenStreetMap contributors
Japanischer Garten
Neckar Käptn
Enjoy liner trips on the Neckar, roundtrips or event trips. Or charter a complete ship just for you. Season is from Easter till end of October. For the conditions see the website. Beverage and food is offered on the ships.
Straßenbahnmuseum Stuttgart
The museum houses 36 historic tram vehicles in its 1929 depot, and offers tram rides on Sundays on metre-gauge, museum tram route 23 with a panoramic portion having an 8.5% maximum grade.
zoological and botanical gardens
Definitely a must for families. But watching monkeys and weird flowers in this old place can be fun for young adults, too. (Unless you feel pity for the locked up creatures.) Wilhelma is also worth visiting for its architecture and landscaping features - the core of Wilhelma is housed in a 19th-century palace and park landscape in the Moorish style, created for and named after the former king Wilhelm of Württemberg. In winter there is a special exhibition called Christmas Garden with beautifully illuminated sculptures.
Bad Cannstatt is older than Stuttgart, and has been a thriving town when today's centre of Stuttgart was still a horse pasture. Moreover, unlike the centre of Stuttgart, the old town of Bad Cannstatt survived the Second World War relatively unscathed. Therefore, you can still get an authenthic, medieval feel wandering around its winding narrow streets, which all lead to a peculiarly-shaped market square.
On the market square, you will find the town church of Cannstatt (Stadtskirche) and the old town hall, still in use as the district's government seat (Bezirksrathaus), both from the late 15th century. It also owns the oldest dwelling in Stuttgart ("Klösterle" / 15th century) that is now used as a wine tavern.