The stone pigsties of la Cancha Curiosity · Santa María del Tiétar, Arenas de San Pedro, Ávila Image of Santa María del Tiétar, not of the place itself. Granite constructions with walls up to a metre thick and a megalithic air, reused for centuries as shepherds' shelters and pigsties. They stand in a district crossed by the Cañada Real Leonesa Oriental. Photo: Asqueladd (CC BY-SA 3.0) What to see and do in Santa María del Tiétar