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May 21-June 6th, 2011. Peru, on a 100 year anniversary of Machu Picchu's first publication in the National Geographic, a 10 day expedition sets out to trace the explorer Hiram Bingham's path to Inca's most sacred city. Here, the beginning point of the 100km expedition, inhabitants of the town of Cachora. Piotr Redlinski for The New York Times.