Landscape of the Aurín River Nature · Sabiñánigo, Alto Gállego, Huesca Image of Sabiñánigo, not of the place itself. The Aurín rises at 2,100 m at the Ibón de Bucuesa, in the sierra de la Partacua, and after forming the valle de Acumuer joins the Gállego north of Sabiñánigo; it is one of the main tributaries that determine the flow of the upper Gállego. Its confluence with the Gállego was strategic for defending the route to the Panticosa spa. Photo: José Antonio Gil Martínez from Vigo, Spain (CC BY 2.0) What to see and do in Sabiñánigo