The Seven Lost Cities Of The World: Machu Picchu, Peru
Located on a mountain ridge above the Urubamba Valley, Machu Picchu was the ‘Lost City of the Incas’, inhabited in the 15th and 16th century. Archaeologists believe that the mountain estate was built for the Inca emperor, Pachacuti, but was abandoned because of the Spanish Conquest.
The inhabitants were also believed to have been wiped out by smallpox introduced by Spanish conquistadors, leading to Machu Picchu becoming one of the lost cities of the world. The actual ruins were discovered centuries later, in 1911, by American historian, Hiram Bingham.