La minería en Sopuerta Historical milestone · Sopuerta, Enkartazioak / Encartaciones, Bizkaia Image of Sopuerta, not of the place itself. From the late 19th century and for much of the 20th, Sopuerta experienced intense mining development, with mining railways, aerial cableways and processing facilities. The Alén district, now abandoned, once had close to a thousand inhabitants and its own services. finales del siglo XIX - siglo XX Photo: Etxaburu (CC BY-SA 4.0) What to see and do in Sopuerta