las médulas is a spanish landscape environment formed by an ancient roman gold mining operation.

rock terrain cliff landscape mountain valley geology badlands hill formation plateau ruins canyon wadi wilderness arch landmark nature médulas spanish environment ancient roman gold mining largest open pit entire empire work carried out antique cave eroded europe forest sandstone tourism tourist travel ponferrada sky summer river archaeological background beautiful bierzo castilla leon countryside desert erosion excavation formations green heritage natural outdoor peaks site spectacular unesco mountains park trees view stone rocks national scenic clouds peak formed considered