The rock carvings of Los Castillos Monument · Cristóbal, Sierra de Béjar, Salamanca Image of Cristóbal, not of the place itself. In the area of Los Castillos several rock carvings on granite are preserved dated to the Bronze Age, and there and at La Corona, near the mouth of the Sangusín in the Alagón, castros were later built. Photo: Estevoaei (CC BY-SA 4.0) What to see and do in Cristóbal