The gold mines of Las Cavenes Monument · El Cabaco, Sierra de Francia, Salamanca Image of El Cabaco, not of the place itself. Declared an archaeological zone on 29 March 2006, Las Cavenes are the great trenches left by Roman open-cast gold mining; from them comes the village's own name, «place where excavations have been made». Photo: Rahico (CC BY-SA 4.0) What to see and do in El Cabaco