Embalse de Yesa Nature · Yesa, Sangüesa, Navarra A reservoir on the Aragón river occupying territory in both Navarre and Aragón, with a capacity of 470 cubic hectometers that makes it the fourth-largest reservoir by capacity in the Ebro basin. Located 2 km from the village of Yesa, it is a venue for water sports, fishing, and paragliding and hang gliding. Photo: Peregrinajaca (CC BY-SA 4.0) What to see and do in Yesa