"...designs for an area prone to earthquakes."
"The site was designed to be impenetrable by invaders,
defended at its back by a nearly insurmountable mountain and
protected by steeply terraced walls."
"Remarkably, Machu Picchu was never found and plundered
by the Spanish explorers despite the fact that it was close to the Incan
"Machu Picchu was abandoned about 100 years
after it was founded, possibly because of a smallpox epidemic.
Scholars still debate over the site's intended use."
"Built at the height of the Incan civilization in what is
now Peru, Machu Picchu was rediscovered on July 24, 1911, by
Yale University scholar Hiram Bingham."