The imposing Najran Valley Dam in southwest Saudi Arabia not only has an important water supply function but is also set in a scenic location. Around 25 kilometers from the city of Najran, the arch dam was completed in 1981 and is Saudi government owned. As well as supplying water, the dam controls flooding and collects run-off water from the valley, releasing it slowly throughout the year. Roads with sharp bends and tunnels wind their way along the Najran Valley — one of the largest on the peninsula — to the dam built on a river course that divides the city. During the rainy season, when the dam is filled with water, the location is especially picturesque and serene.