Museu Arte Nova
While this museum celebrates the city's rich art nouveau heritage, the main event is the actual building, known as Casa Major Pessoa, a wonderfully flamboyant example of the genre dating to 1909. Notable among the displays are stunning hand-painted tiles decorated with flowers, birds, and animals. The collection itself has a few items of interest, but the biggest plus is that visitors are given a map of various art nouveau landmarks around the city. They're easy to find, marked with silver plaques on the ground.