Potosí - The Devil's Silver, Bolivia (129/418)

Considered, in the 16th century, to be the biggest industrial complex in the world, the extraction of minerals relied on a series of hydraulic mills. The site consists of the industrial monuments, the Cerro Rico, where water is provided by an intricate system of aqueducts and artificial lakes, the colonial town with the Casa de la Moneda, the Church of San Lorenzo, patrician houses and the "barrios mitayos" which were workers' living quarters.