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
Inca Trail to Machu Picchu this rule, permits can only be obtained through a government registered tour operator. All permits are paired with an individual passport, and are not transferable. The government monitors the trail closely; there are several control points along the trail. The Inca Trail elevation varies quite significantly and people often struggle with altitude sickness, especially if they have not spent much time in Cusco prior to trekking the trail. Cusco stands at 3,200 metres and is already significantly higher than Machu Picchu itself, however, many sections of the Inca Trail are much higher. Starting at 2,600 metres, the trail ascends to