The Peña Castillo Nature · Manzanal de Arriba, La Carballeda, Zamora Image of Manzanal de Arriba, not of the place itself. At 1,185 metres it is one of the three greatest heights of the Sierra de la Culebra; halfway up the slope, at nine hundred metres, sits Santa Cruz de los Cuérragos, and from the summit the border with Portugal is taken in. Photo: Antramir (CC BY-SA 3.0) What to see and do in Manzanal de Arriba