The dolmen of El Tesoro Nature · Morales de Rey, Benavente y Los Valles, Zamora Next to this megalithic tomb of some five thousand years stand a full-size replica and an archaeological classroom, in the Eria valley and at the foot of the Sierra de Carpurias, among pines, holm oaks, yews and mulberry trees. Photo: Ernestobanpiroa (CC BY 4.0) What to see and do in Morales de Rey