Foto de stock - The El Atazar reservoir, located in the Sierra de Ayllón in the Community of Madrid, Spain, is one of the largest reservoirs in the region and is used to supply drinking water to the city of Madrid and its surroundings. The El Atazar dam, built between 1968 and 1972, is a concrete structure designed to regulate the flow of the Lozoya River and store water for later use. It has a height of 134 meters and can store up to 425 million cubic meters of water. In addition to its main function, the El Atazar reservoir has additional infrastructure that includes a water treatment plant and a distribution network that supplies water to more than 3 million people in the city of Madrid. It is also a popular destination for recreation, where you can engage in activities such as fishing, hiking and water sports. The Sierra de Ayllón, where the El Atazar reservoir is located, is also home to other reservoirs and natural features of interest