Machu Picchu, recognized as one of the New Wonders of the World, is located on the territory of modern Peru, at the top of a mountain range at an altitude of 2450 meters above sea level. It is called "the city in the sky" or "the city among the clouds", sometimes it is called the "lost city of the Incas". Some archaeologists believe that this city was established as a sacred mountain refuge by the great Inca ruler Pachacutec around 1440, and functioned until 1532, when the Spanish invaded the Inca Empire. In 1532, all its inhabitants mysteriously disappeared