The pools of El Borbollón Nature · Sotillo de la Adrada, Arenas de San Pedro, Ávila Image of Sotillo de la Adrada, not of the place itself. Beside the Mañas spring, these pools of the stream are the municipality's natural bathing place, at 635 metres of altitude, at the point where the foothills of Gredos drop towards the floor of the Tiétar valley. Photo: Asqueladd (CC BY-SA 3.0) What to see and do in Sotillo de la Adrada