Flamencos en el Altiplano Andino (Bolivia) During the colonial period, Potosf was a great city of more than 150,000 inhabitants. High in the ore-laden mountains, at a height of almost 16,000 ft. (4,900 m.), Potosi was the world's greatest supplier of silver. But the rigors of the city's harsh climate, its inaccessibility, and competition from […]