Segregación de El Campillo de Zalamea la Real Historical milestone · El Campillo, Cuenca Minera, Huelva El Campillo, which had grown as a mining settlement following the arrival of the Rio Tinto Company Limited in the late 19th century, became independent from Zalamea la Real as its own municipality in 1931. Photo: Estevoaei (CC BY-SA 4.0) What to see and do in El Campillo