Machu Picchu is a pre-Columbian 15th-century Inca site located 7,970 ft above sea level. It is situated on a mountain ridge above the Urubamba Valley in Peru, which is 50 miles northwest of Cusco and through which the Urubamba River flows. Most archaeologists believe that Machu Picchu was built as an estate for the Inca emperor Pachacuti (1438–1472). Often referred to as the "Lost City of the Incas", it is perhaps the most familiar icon of the Inca World. Although known locally, it was unknown to the outside world before being brought to international attention in 1911 by the American historian Hiram Bingham.
Since the site was never known to the Spanish during their conquest, it is highly significant as a relatively intact cultural site. Machu Picchu was declared a Peruvian Historical Sanctuary in 1981 and a UNESCO World Heritage Site in 1983. In 2007, Machu Picchu was voted one of the New Seven Wonders of the World in a worldwide Internet poll.
