The banks of the Esla at San Cebrián Nature · San Cebrián de Castro, Tierra del Pan, Zamora Image of San Cebrián de Castro, not of the place itself. The river traces here a meander set between slopes of scrubland on which Castrotorafe sits; its groves of ash and poplar are among the best preserved stretches of the lower course of the Zamoran Esla. Photo: Enrique.garzo.cano (CC BY-SA 4.0) What to see and do in San Cebrián de Castro