Ordunte Reservoir
Between the Ordunte Mountains and the Sierra de la Costera in a natural area renowned for tree species such as the holly, strawberry tree, local pine and north pine, lies the impressive landscape which includes the Ordunte Reservoir, a reservoir built in 1934 and holding 23 million cubic metres which supply Bilbao with water collected by damming the rivers Cerneja and Ordunte. Added to the natural beauty of the area is the great archeological value placed on the numerous signs of settlement and funeral tumuli dating from the Copper Ages (3,000 years BC).

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