The military post of Caecilius Vicus Curiosity · Montemayor del Río, Sierra de Béjar, Salamanca Image of Montemayor del Río, not of the place itself. Quintus Caecilius Metellus Pius established around 79 BC a line along the Camino de la Plata from Medellín to the pass through the Central System, with the forward post of Caecilius Vicus near the present boundary of Salamanca with Cáceres. Photo: Ramajero (CC BY-SA 4.0) What to see and do in Montemayor del Río