The prehistoric sites of the municipality Curiosity · San Cebrián de Castro, Tierra del Pan, Zamora Image of San Cebrián de Castro, not of the place itself. Casilla de Flores, Rascollobos and Los Cascajales preserve prehistoric remains of substance which, together with the Roman villa nearby, document a continuous occupation of the valley of the Esla from very ancient times. Photo: Enrique.garzo.cano (CC BY-SA 4.0) What to see and do in San Cebrián de Castro