El Atazar

El Atazar Dam is an arch dam built near Madrid, Spain on the Lozoya River, very close to where the Lozoya joins the Jarama. The curved design of the dam is optimum for the narrow gorge in which it was built to retain water in the reservoir. Arch dams are thin and require less material to construct than other dam types.When the dam was built, the decision was made to use the dam to store and regulate water only and not to provide energy. Construction started on the dam in 1968 and finished in 1972.

Robledillo de la Jara is a municipality of the Community of Madrid, Spain. It has an area of 20.35 km ² with a population of 130 people and a density of 6.39 inhabitants per km ².

The Lozoya River (Spanish pronunciation: [loˈθoʝa]) is a river flowing near the centre of Spain. It originates at a high altitude in the Sistema Central and cuts downward through steep rocks to flow into the Jarama River, a major tributary of the Tajo, the longest river on the Iberian Peninsula.

Cervera de Buitrago is a municipality of the autonomous community of Madrid in central Spain. It belongs to the comarca of Sierra Norte.

Patones is a Spanish municipality in the region of the Comunidad de Madrid situated partly in the valley of the river Jarama and partly in the foothills of the Sierra de Guadarrama mountain range. Although small, the town has its own council, and consists of two distinct settlements: The ancient hillside village (Upper) Patones Arriba and the modern (Lower) Patones Abajo on the plain below. Altitude: 834 m Extension: 35 km² Distance from Madrid: 60 km Population (in 1999) 368According to an 18th-century travelogue quoted below, the name is believed to originate from the family name of the first settlers Patón, who were, reputedly refugees from Muslim invaders who established a private Christian Kingdom of Patones Alternatively, since Iberian languages are of Latin origin the name may simply be derived from patricius.

Uceda is a municipality located in the province of Guadalajara, Castile-La Mancha, Spain. According to the 2004 census (INE), the municipality has a population of 1,575 inhabitants. The church of Santa María de la Varga stands in the town.

The Church of Santa María de la Varga (Spanish: Iglesia de Santa María de la Varga) is a former church located in Uceda, Spain. It was declared Bien de Interés Cultural in 1991.Built atop a former mosque, the church was erected in a Romanesque style in the 13th century by the Archbishop of Toledo, D. Rodrigo Jiménez de Rada.

The Watchtower of El Berrueco (Spanish: Atalaya de El Berrueco), also known as the Watchtower of Torrepedrera (Spanish: Atalaya de Torrepedrera) is a watchtower of Islamic origin located in El Berrueco, Spain. It is situated close to the El Altazar dam, atop a 1030 m hill in the Sierra de Guadarrama. It was declared Bien de Interés Cultural in 1983.

El Berrueco (Spanish pronunciation: [el βeˈrweko]) is a municipality of the autonomous community of Madrid in central Spain. It is located in the north of the Community of Madrid.

Torremocha de Jarama is a municipality of the Community of Madrid, Spain.

The Church of la Magdalena (Spanish: Iglesia de la Magdalena) is a Gothic-style church located in Torrelaguna, central Spain. It was declared Bien de Interés Cultural in 1983. It has a nave and two aisles, with Gothic vaults supported by flying buttresses between which are the side chapels, each with movable retablos. The bell tower dates to the 15th century, and was commissioned by Cardinal Cisneros, whose coat of arms, together with those of the town, can be seen externally on the third floor. The so-called "Portal of the Resurrection" (16th century) is in mixed Mudéjar–Renaissance style. The high altar is by Narciso Tomé.

Torrelaguna (Spanish pronunciation: [torelaˈɣuna]) is a municipality in the Community of Madrid, Spain. It covers an area of 43.40 km2. As of 2018, it has a population of 4,724.