Wolfram from Valborraz for Nazi Germany Historical milestone · Carballeda de Valdeorras, Valdeorras, Ourense Image of Carballeda de Valdeorras, not of the place itself. During the Second World War the mines of Valborraz, in Carballeda de Valdeorras, extracted wolfram destined for the German armaments industry, using Republican prisoners of war for the labor. 1939-1945 Photo: Estevoaei (CC BY-SA 4.0) What to see and do in Carballeda de Valdeorras