An old sugar mill, the Solar consists of a number of beautifully preserved heritage buildings centered around a lovely stone courtyard that dates back to the 18th century. Half the fun is just to wander around and explore the various buildings set on the waterfront (the views are fabulous). The main building houses a small modern art museum; you'll find some works of Portinari and Di Cavalcanti on display. The path to the right of the main building leads above the rocks to the sculpture garden with works by Caribé and Mario Cravo. Allow an hour.
Tip: On Saturdays at 6pm there is a live jazz performance, a great way to spend happy hour (R$4).