Sé Catedral de Faro
This stunning 13th-century cathedral, flanked by cobblestone streets, whitewashed houses, and fragrant orange trees, is one of Faro's most beautiful monuments. Having survived transformations (including a past as a Roman basilica, then a mosque), earthquakes, and fires, the Sé retains a Gothic tower but is mostly of interest for the 17th- and 18th-century azulejos that fill its interior. On one side of the nave is a red chinoiserie organ, dating to 1751. Best of all, however, is the view from the top of the church tower (up some very steep stairs), looking out over Cidade Velha rooftops and across the lagoon.