Teotihuacan, Mexico, Pyramids

The city of Teotihuacan, containing important structures such as the Pyramids of the Sun and the Moon, with a population of 200,000, was suddenly abandoned in the 7th century AD. The cause is unknown; There may be many factors such as hunger, famine, war, and there are even those who claim that the people here came from space and went to space. They left without a trace.