Hiram Bingham III Stuart McNairn whose descendants claim that they had already climbed to the ruins in 1906). Also the Cusco explorers Enrique Palma, Gabino Sanchez and Agustín Lizarraga are said to have arrived at the site in 1901. Bingham returned to Peru in 1912, 1914 and 1915 with the support of Yale and the National Geographic Society. In "The Lost City of the Incas" (1948), Bingham related how he came to believe that Machu Picchu housed a major religious shrine and served as a training center for religious leaders. Modern archaeological research has since determined that the site was not a religious
PeruRail which boasts a series of five switchbacks called locally 'El Zig-Zag', which enable the train to climb up the steep incline out of Cusco, before it can begin its descent to the Sacred Valley of the Incas and then continue down to Machu Picchu. However, this section of the route is currently suspended, and all trains to Machu Picchu leave from Poroy, just outside Cusco, instead. From Poroy, the narrow-gauge line goes northwest to Ollantaytambo, where the branch from Urubamba joins, then on to Machu Picchu station in Aguas Calientes. Tracks formerly continued into the jungle, but they were destroyed