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Tourists walk among the ruins of the Machu Picchu citadel, 130 km northwest of Cusco, Peru on July 6, 2011. The Inca compound is being prepared for the centennial commemoration of its discovery by American adventurer and archaeologist Hiram Bingham in 1911. Machu Picchu recognized as a World Wonder in 2007 sits at 2,350 meters above sea level in the heart of the Urubamba valley in southern Peru, 510 kilometers south of Lima. The complex which remained unknown to Spanish conquerors is now visited by up to 250,000 a year. AFP PHOTO/Cris BOURONCLE (Photo credit should read CRIS BOURONCLE/AFP/Getty Images)
Tourists walk among the ruins of the Machu Picchu citadel, 130 km northwest of Cusco, Peru on July 6, 2011. The Inca compound is being prepared for the centennial commemoration of its discovery by American adventurer and archaeologist Hiram Bingham in 1911. Machu Picchu recognized as a World Wonder in 2007 sits at 2,350 meters above sea level in the heart of the Urubamba valley in southern Peru, 510 kilometers south of Lima. The complex which remained unknown to Spanish conquerors is now visited by up to 250,000 a year. AFP PHOTO/Cris BOURONCLE (Photo credit should read CRIS BOURONCLE/AFP/Getty Images)

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Machu Picchu: A mix of backpackers and business people

CNN's Richard Quest visits one of the new seven wonders of the world, and finds out why over a million people visit the site every year.

Machu Picchu: A mix of backpackers and business people

CNN's Richard Quest visits one of the new seven wonders of the world, and finds out why over a million people visit the site every year.