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 operation largest open pit mine entire empire engineering work carried out ancient antique cave environment eroded europe forest hill mine mountain nature roman sandstone tourism tourist travel valley ponferrada sky canyon summer river archaeological background beautiful bierzo castilla castilla leon countryside desert bierzo erosion excavation formations gold gold mining green heritage landscape leon natural natural landscape outdoor peaks site spectacular unesco mountains rock park trees view stone rocks national scenic clouds peak