Start at the Marktplatz, explore the outdoor market. Then go around the area and check out the buildings and do some window-shopping. (There are department stores as well as some pretty ritzy boutiques in this area). Don't miss Münster von der Wettsteinbrücke aus (lovely castle-like buildings by the Rhein), Andreasplatz, Heuberg and St. Alban-Vorstadt (quaint small streets and steps).