Machu Picchu is the Inca city is one of Peru’s most precious treasures. It was built in the mid-fifteenth century and is believed to have been one of the residences of the ninth Inca of Tahuantinsuyo, Pachacutec, although it also contains the remains of a sanctuary. Its name means old mountain, and alludes to the place where it is located, about 2453 meters above sea level, in a rocky premonitory between Machu Picchu and Huayna Picchu. It is frequent that during the ascent travelers feel altitude sickness.