Ermita de San Gregorio y restos del castillo Monument · Piedras Albas, Comarca de Alcántara, Cáceres Image of Piedras Albas, not of the place itself. Hermitage now in ruins, used as a cemetery, next to the remains of a former castle located about 300 paces south of the town. Photo: 19Tarrestnom65 (CC BY-SA 4.0) What to see and do in Piedras Albas