Fodor's Expert Review Museo de Sonora
The best viewpoint in the city is the top of Cerro de la Campana (Hill of Bells), where you'll also find the Museo de Sonora. The museum is in a former penitentiary; the cells hold 18 permanent exhibits on astronomy, anthropology, history, geology, geography, and culture, all with a Sonoran slant. The bulk of the exhibits are graphic displays, including charts and maps of trade routes and native populations. Each display has a short summary in English.