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Photo: Photo: Andreas Praefcke, CC BY 3.0 via Wikimedia Commons
Located at the heart of the city's grid, this central square features the historic Grupello Fountain and serves as Mannheim's main public transport hub and a popular meeting point.
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REM
At D5 and C5 (see above for an explanation of downtown addresses), the REM houses a permanent exhibition world cultures along with an exhibition hall whose contents range from photography to astronomy.
Barockschloss Mannheim
One of Europe's largest Baroque complexes, this former electoral residence features a museum with restored state rooms where a young Wolfgang Amadeus Mozart performed in 1763; today, it also houses the main campus of the University of Mannheim.
Wasserturm
One of the most famous icons of the Jugendstil (Arte-Nouveau style) in Germany, the water tower (and small park surrounding it) is a great place to sit in the summer for a picnic or just a little rest (officially, walking or sitting on the lawn is prohibited). The park is surrounded by the Rosengarten, a conference hall of reddish brick, and the colors on a sunny day are amazing.
Art Gallery
A museum for modern and contemporary art featuring an extensive collection of sculptures and paintings from the 19th century to the present. The facility consists of a historic building from 1907 and a modern extension, housing both permanent galleries and temporary exhibitions.