scree on the west side of the alto de las guarramillas in navacerrada, spain.

accumulation adventure alto background beautiful blue bola boulder boulders bushes caution collapse cornices del due environment europe falling formation geology granite green guadarrama guarramillas hiking landfall landscape landslide las lichen madrid moss mountain mountainside mundo natural nature navacerrada outdoor outdoors park rock rockfall rocks scenery scenic scree side sierra sky slope spain spring stone summer tree weathering west wilderness