Mines of Valborraz Curiosity · Carballeda de Valdeorras, Valdeorras, Ourense Wolfram workings opened in the mountains during the Second World War, when the mineral was strategic for the arms industry; today the galleries, the buildings and the spoil heaps remain abandoned. Photo: Estevoaei (CC BY-SA 4.0) What to see and do in Carballeda de Valdeorras