Arrival of irrigation in the Páramo Historical milestone · Bercianos del Páramo, El Páramo, León Image of Bercianos del Páramo, not of the place itself. After the building of the Barrios de Luna reservoir, opened in 1956, irrigation spread through much of the comarca, with enormous social and economic consequences: maize and sugar beet joined the dry-farmed wheat and barley. 1959 Photo: LAVF (CC BY-SA 4.0) What to see and do in Bercianos del Páramo