In this area the Jarama River is the natural border of the community of Madrid and the province of Guadalajara, through the municipalities of Patones, Torremocha de Jarama and Torrelaguna, forming the beginning of a Valley characterized by its amplitude and fertility.

The water in this area acquires a special importance because of the large number of hydraulic infrastructures (channels, old homemade, bridges, beacons, etc.), you run through the different municipalities of this subregion.

The landscape of the limestone in the surroundings of Torrelaguna and Patones, contrast with the granite to which we are accustomed the Sierra Norte. The fluvial terraces, but in this stretch of the Jarama are not still very relevant, they announced already a typical landscape of still mixed with rain-fed agriculture irrigation.

All the municipalities that make up this sub-region, they have a cultural and natural heritage of great importance. From the point of view of historical heritage - art stand out as perfectly integrated in the landscape and original architectural elements, the Muslim "watchmen", watch towers, located in strategic locations and built in stone masonry. Among the sub-region of the Valley of Jarama are the watchtower of the fleece from where you can see a magnificent panoramic view of the entire Sierra La Cabrera, the vega del Jarama and the city of Madrid in the distance, the description SS Watchtower at Torrelaguna, or the Torreoton in Torremocha de Jarama.

The stunning views that suggests the beautiful El Atazar dam, as well as those of the town which bears his name, the rural and almost magical environment of Patones, the forest of cork oaks in Torrelaguna, the Museum of agriculture in Torremocha de Jarama, etc., They invite you to delve into this sub-region of great naturalistic values, landscape, cultural and human, where at the same time the visitor can admire important examples of historical heritage - art in the urban core of Torrelaguna, It reflects the importance and relevance which the Villa exerted in the past.