Through the riverbeds of the rivers Rudrón and Ebro, the park is formed by a characteristic succession of deep canyons and narrow gorges caused by the effect of water and winter over this limestone during the last centuries.
Around the canyons, that in certain sections are even 200 metres height, extend wide moors that sometimes led to impressive viewpoints towards the landscape of the park.
Within the borders of the protected areas, there are several elements of natural interest such as the waterfall of Fuente de Orbaneja, the karastic spring of Pozo Azul in Covanera or the Cueva del Moro. In this latter, the Rudrón river resurfaces after having sunk underground in a previous section of its course.
Vegetation and fauna
There are a wide range of vegetation in the area. Elements from the mediterranean and atlantic climate are mixed with those of the north of Spain such as the holm oak, the beech tree, the gall oak, the willow and the black poplar.
The huge rocky places of its cliffs are a perfect ecosystem to many cliff-nesting birds such as the imperial eagle, the Bonelli’s eagle, the griffon vulture, the eagle owl and the peregrine falcon.
Furthermore, in the mountain areas of northern Spain are mammals such as the roe deer, the badger, the Pyrenean desman and the otter. The quantity of amphibians and reptiles that populate the Alto Ebro and Rudrón gorges is also remarkable.