sentences:  The Lozoya Valley supports a large black (monk) vulture colony, and one of the last bastions of the Spanish imperial eagle in the world is found in the Park Regional del Suroeste in dehesa hills between the Gredos and Guadarrama ranges.The recent possible detection of the existence of Iberian lynx in the area between the Cofio and Alberche rivers is testament to the biodiversity of the area.Taking advantage of the orography, there are several reservoirs and dams in the region, with the Santillana reservoir being the largest.