is a pre-Columbian 15th-century Inca site located 2,430 meters (7,970 ft) above sea level in the Cusco Region of Peru, South America. It is situated on a mountain ridge above the Urubamba Valley in Peru, which is 80 kilometers northwest of Cusco and through which the Urubamba River flows.
Without the use of a wheel or Iron tools, the city of stone was constructed to include over 600 terraces, a 1/2 mile long water delivery system, and temples built of amazing stone work. One of the mysteries that remains is how 50 ton stones got to the top of the mountain ridge. The mystery remains who built the site and when.
video: http://www.youtube.com/watch?v=qAFWITA5_pg — with Carlos Serrano, Renate Filipzik, Ellen Paraiso Tabaranza, Aumaurilio Justo and Fátima Lopes.