The dolmens of San Adrián and Las Peñezuelas Monument · Granucillo, Benavente y Los Valles, Zamora Two megalithic tombs of the Bronze Age mark the oldest occupation of the municipal district; next to them are preserved the hermitage of San Adrián and the ruins of the castle and palace of the counts of Benavente. Photo: David Perez (CC BY 3.0) What to see and do in Granucillo