Machu Picchu Base joined the Antarctic Treaty as a member adherent, with voice and vote in making all decisions related to the southern area. However, in agreeing to the Treaty, Peru reserved its rights to territory and influence over Antarctic climate, ecology and marine biology, in addition to a continuity of geology and historical links. In 1989 when Machu Picchu Base was founded, it acquired the status of advisory member within the Antarctic Treaty. In 1993 the Constituent Assembly extended the declaration of 1979: The Peruvian government created a National Commission for Antarctic Affairs (CONAAN) in July 1983 as a technical body composed
Machu Picchu an Inca grass rope bridge, across the Urubamba River in the Pongo de Mainique, provided a secret entrance for the Inca army. Another Inca bridge was built to the west of Machu Picchu, the tree-trunk bridge, at a location where a gap occurs in the cliff that measures . The city sits in a saddle between the two mountains Machu Picchu and Huayna Picchu, with a commanding view down two valleys and a nearly impassable mountain at its back. It has a water supply from springs that cannot be blocked easily. The hillsides leading to it were terraced, to provide