Machu Picchu, or "Old Peak" is a pre-Columbian, 15th-century Incan site located 7,970 ft (2,430 meters) above sea level. Machu Picchu is located in the Cusco Region of Peru, South America. It is situated on a mountain ridge above the Urubamba Valley in Peru, through which the Urubamba River flows. Most archaeologists believe that Machu Picchu was built as an estate for the Incan Emperor Pachacuti (1438-1472). Often referred to as the "Lost City of the Incas", it is perhaps the most familiar icon of the Incan people, and known world-wide as one of the 7 Wonders of the New World.