We did most of a walking tour suggested by our Fodor's guidebook. It's a very picturesque town with lots of narrow winding cobblestone streets. We saw this fountain with four dolphins. It's located about a block away from the Eglise St-Jean-du-Malte, one of the earliest Gothic structures in France.
We also saw the Ancienne Halle aux Graines which has an allegorical frieze of the rivers Rhône and Durance.
Unfortunately we ran out of steam before visiting the Cezanne studio. We're considering returning to Aix within the next few days and focusing primarily on that.