Geometry is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space.
Machu Picchu is a pre-Columbian 15th-century Inca site located 2,430
meters (7,970 ft) above sea level. It is situated on a mountain ridge above the Urubamba Valley in Peru, which is 80
kilometers (50 mi) northwest of Cusco and through which the Urubamba River flows. Most archaeologists believe that Machu Picchu was built as an estate for the Inca emperor Pachacuti (1438–1472). Often referred to as the "Lost City of the Incas", it is perhaps the most familiar icon of the Inca World.
Machu Picchu is a UNESCO World Heritage Site. Since its discovery in 1911, a growing number of tourists visit Machu Picchu, reaching 400,000 in 2003. As Peru's most visited tourist attraction and major revenue generator, it is continually threatened by economic and commercial forces. In the late 1990s, the Peruvian government granted concessions to allow the construction of a cable car and development of a luxury hotel, including a tourist complex with boutiques and restaurants. Many people protested against the plans, including members of the Peruvian public, international scientists, and academics, as they were worried that the greater numbers of visitors would pose a tremendous physical burden on the ruins. Source:
Wikipedia, Machu Picchu.