74km/46mi further on from San Ignacio you come to the little port of Santa Rosalía (population 14,000). The little town was founded in the middle of the 19th century. The French, to whom the copper mines of the region previously belonged, built the church of Santa Rosalía, which was constructed of imported iron sections and was reputedly based
on a design by Gustave Eiffel, the constructor of the Eiffel Tower. Further items of interest are the anthropological museum in the Casa de Cultura, and at the northern entrance a mining museum with an old train used for transporting ore. There is a ferry link to Guaymas (Sonora).