CIRCUIT: Visit to the Pukara de Quitor, a 12th  Century (pre-Inca) fortress. Quitor is strategically located and was easily  defended on all sides, until the Spanish arrival with the advantage of horses.  Partially restored in 1992, the Pukara de Quitor is one of the most complete  and impressive of these early defensive measures. Crossing the ;Ayllos  or  community farm areas, we arrive at Tulor,  the site of the earliest known settlement in the area known as the "Aldea de Tulor". This settlement is more than 2,000 years old and consists of circular  dwellings interconnected by common passages and patios. Only part of the  settlement is visible, the rest has being covered by the constantly moving  desert sands. Return to San Pedro.