The wolfram mines of Varilongo Historical milestone · Santa Comba, Xallas, A Coruña Image of Santa Comba, not of the place itself. Wolfram from Varilongo, essential for war-grade steel, drove up mining activity in Santa Comba during the Second World War (1939-1945) and drew thousands of workers as well as buyers from the powers at war. década de 1940 Photo: Miguel Branco (CC BY-SA 4.0) What to see and do in Santa Comba