São Domingos Mine

The São Domingos Mine is a deserted open-pit mine in Corte do Pinto, Alentejo, Portugal. This site is one of the volcanogenic massive sulfide ore deposits in the Iberian Pyrite Belt, which extends from the southern Portugal into Spain. The Romans mined in the São Domingos area for gold and silver for about 400 years. Mining stopped here when the Romans left (from Wikipedia)