Parroquia de Santa Maria de Guadalupe is El Oro's main church, a handsome 18th-century stone building with twin bell towers and a neoclassical facade. Inside, the tiled dome over the nave is the feature that makes it stand out.
It is a natural stop while walking the old mining town's compact centre. Pair it with Teatro Juarez and the Mining Museum for the clearest picture of El Oro's boom-town years.