The Routes of the Castles of the Community of Madrid include 20 fortresses, which were built during three stages: the Andalusian era, the Castilian repopulation and the so-called stately. The castles that star in the illustrations are that of the Coracera, located in San Martín de Valdeiglesias; Gonzalo Chacón, erected in Arroyomolinos.
They include the walled enclosure and the Castle of the Mendoza of Buitrago del Lozoya, the remains of that of Torrelaguna, and the castle of the Alameda.