machu picchu

[size=18]Five hundred yaers ago,Machu Picchu was a vibrant city high on a mountain top in Peru.
Archaeologists think it was built by the Incas around 1460 C.E.Then,in the early 1500s,Machu Picchu was deserted.Thick jungle plants covered the city. It was forgotten for handreds of years.The city was rediscoverd in 1911 by the explorer Hiram Bingham.But why did the Incas leave the city? was there a war or som terible disease?No one knows. The full story of Machu Picchu remains a mystery.[/size]