The factory that industrialised the Serrablo Historical milestone · Sabiñánigo, Alto Gállego, Huesca Image of Sabiñánigo, not of the place itself. Energía e Industrias Aragonesas raised from 1918 beside the station a chlorate factory taking advantage of the hydraulic power of the Gállego; within a few decades it multiplied the municipality's population and completely changed the valley's landscape. 1918 Photo: samianiguense (CC BY-SA 3.0) What to see and do in Sabiñánigo