The El Burguillo reservoir Nature · El Barraco, Burgohondo - El Tiemblo - Cebreros, Ávila The El Burguillo reservoir, in the sub-basin of the Alberche river, is shared between the municipalities of El Barraco and El Tiemblo, in the province of Ávila, and is the largest and most important in the province, with 910 hectares of surface area and 208.6 cubic hectometres of capacity. Built in 1913 to regulate the Alberche under a design by the engineers E. Becerril and A. Peralba, it is one of the oldest dams in Spain, 91 metres high and 300 metres along its crest; it supplies water for irrigation and drives hydroelectric power stations. Its expanse of water, set between pine-covered slopes, is today one of the valley's bathing and boating areas, with zones for sailing, rowing and motor boats; on a small island stands a building imitating a medieval castle surrounded by a wall. Photo: fjest (CC BY-SA 3.0) What to see and do in El Barraco