Sierra del Risco Nature · Sierra de Fuentes, Comarca de Cáceres, Cáceres Image of Sierra de Fuentes, not of the place itself. At 664 meters, it is the highest point of the Sierra de la Mosca and offers a natural lookout over much of the municipal term. In the Bronze Age it served as a watch post. Photo: Jesusccastillo (CC BY-SA 4.0) What to see and do in Sierra de Fuentes