Ouro Preto ( Portuguese pronunciation : ( ˈoɾu ˈpɾetu ) , Black Gold ) is a city in the state of Minas Gerais , Brazil , a former colonial mining town located in the Serra do Espinhaço mountains and designated a World Heritage Site by UNESCO because of its outstanding Baroque architecture .
Ouro Preto ( from Portuguese , Black Gold ) is a town in the state of Minas Gerais , Brazil .