Open-cut mines dating from the Roman period. They have been declared a World Heritage Site by UNESCO.
Open-cut mine dating from the Roman period of Hispania.. It is in the district of Bierzo, in León, about 20 kms. from Ponferrada They are reached from the Orense-Carucedo road. A canal system brings the water from the Eria and Cabrera Rivers over 100 kilometres away. The landscape is a stunning red.