Festivities of los Fayos Activity · Los Fayos, Tarazona y el Moncayo, Zaragoza Image of Los Fayos, not of the place itself. Los Fayos, wedged beneath a rocky bluff at the confluence of the Val and Queiles rivers, saw the completion in 1996 of the Val reservoir, with a dam 96 metres high. It preserves the church of Santa María Magdalena, from the late 16th century, and the palace of the dukes of Villahermosa, from the 17th century. Photo: Juande (CC BY-SA 2.0) What to see and do in Los Fayos