Why did Machu Picchu build a house on the edge of a cliff?

Archaeological findings (combined with the interpretation of early colonial documents) show that Machu Picchu is not an ordinary city, but a rural seclusion of Inca nobles (similar to Roman manor). Around the courtyard, there is a huge palace and a temple dedicated to the Inca god, as well as other houses for maintenance personnel to live in. It is estimated that the number of people living in Machu Picchu does not exceed 750 at the peak, and even less during the rainy season when no nobles visit.

The Inca kingdom chose to build a city here, probably because of its unique geographical and geological characteristics. It is said that the outline of the mountain behind Machu Picchu represents the Inca's face looking up at the sky, and the highest peak of the mountain, "Wana Picchu", represents his nose. The Incas thought that stones should not be cut off from the earth, so they looked around for scattered stones to build cities. Some stone buildings don't even use gypsum, and they are completely finished by precise cutting and stacking. The gap between the stones on the wall is less than 1 mm wide. Introduce Machu Picchu. This site has attracted wide attention.

In 2003, about 400 thousand people visited Machu Picchu, and UNESCO expressed concern about the damage caused by large-scale tourism to the site. Peruvian authorities insist that this is not a problem, and the remoteness of the site will form a natural restriction on tourism. It has been suggested to build a cable car there, but it has not been approved so far.

Machu Picchu, also translated as Machu Picchu, is located 75 kilometers northwest of Cuzco, Peru today. The whole site is located on the ridge about 2350 meters above sea level, overlooking Urubamba Valley and surrounded by tropical jungle. It is a relic of the famous pre-Columbian Inca Empire in Peru, built around 1 500 years ago, and it is also new in the world.

Machu Picchu means "ancient mountain" in Quechua, also known as "lost Inca city", which is a well-preserved pre-Columbian Inca relic. Machu Picchu is the most important archaeological excavation center in South America, so it is also the most popular tourist attraction in Peru.

Due to its unique location, geographical features and late discovery, Machu Picchu became the most familiar symbol of the Inca Empire. 1983, Machu Picchu was designated as a world heritage by UNESCO, which is one of the few cultural and natural heritages in the world.