Visit Machu Picchu, the Inca Sanctuary or go on the Inca Trail. For most visitors, the Inca city of Machu Picchu is the highlight of their visit. The Historic Sanctuary of Machu Picchu was revealed to the Western world by the American Hiram Bingham on July 24 1911, and was declared a World Heritage Site by UNESCO in 1983. The Lost City of the Incas, Machu Picchu is probably the most important archaeological site in South America and requires at least one day to fully explore it. http://ping.fm/u0UFG