Huecha River in Campo de Borja Nature · Borja, Campo de Borja, Zaragoza The Huecha rises at around 1,000 m from the confluence of the Barranco de Morana and the Barranco de Horcajuelo, on the slope of the Moncayo, and receives inflows from karst springs such as those of the caves of Añón. It gives its name to the middle valley occupied by Borja, situated on the slope of a hill crowned by its castle, and to the wine-growing region of the Campo de Borja, which extends from the Moncayo massif to the banks of the Ebro. Photo: Wikipedia / Wikimedia Commons (CC BY-SA) What to see and do in Borja