
Photo: Ra Boe, CC BY-SA 2.5 via Wikimedia Commons
A fascinating astronomical journey, projected by optical hightech equipment: Carl Zeiss Planetarium. Almost all the shows conducted here are in German. You may have to check with the office for English show timings.
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Opera House
Pass the New Palace to the left and you find yourself in the beautiful Schlossgarten with the Opernhaus in front of an artificial lake, as part of the Staatstheater Stuttgart. Also the parliament of the state of Baden-Würrtemberg is there.
Main Railway Station
The Railway Station was built in 1920 as a terminus station. The 56-meter-high tower with its rotating and illuminated Mercedes-Benz is one of the most famous city landmarks. On top of the tower there is an exhibition of the most controversial infrastructure project in Germany called S21. The plan is to convert the main line terminus station into an underground through station by turning the tracks with a 90-degree angle to the present station. It's free to climb up and grants awesome views of Königstraße and the city.
State Gallery
There are two exhibitions in different buildings. "Alte Staatsgalerie" ("Old": Art from 1500 to 1900) and "Neue Staatgalerie" ("New": Modern art). You can walk inside from one exhibition to the other. The permanent exhibits are free on Wednesdays and Saturdays.
Watch and listen to the ballet company of the state theater Stuttgart. It is one of the world's best ensembles founded by legacy of John Cranko. Definitely a top place to go to in the evening. You'll need to reserve tickets in advance.
Stellwerk S
Scale model of Stuttgart (1:160) of the 1980s. Including complete model railway layout and landscape parts. Biggest city model in Europe.
Small ruin close to the observatory. Nice view.