Mining settlement of Peña del Seo Curiosity · Corullón, El Bierzo, León The Peña del Seo mining village, also called the village of la Piela, is an abandoned mining hamlet at the foot of Peña del Seo, in the hamlet of Cadafresnas, in Corullón. It arose around the discovery of wolfram ore around 1940, a mineral prized for heavy weaponry that sparked a passing fever in these valleys; after an initial phase of covert gathering during the Second World War, the mining boom surged with the Korean War. The village was built between 1952 and 1953, with 41 dwellings of about 60 square metres fitted with heating, hot water and electric light, comforts far superior to those of other similar mining villages. The mines closed in 1958. It is included on the Red List of Heritage at Risk of Hispania Nostra. Photo: F Num Dig (CC BY-SA 4.0) What to see and do in Corullón