Pyramid of Giza (Egypt). Pyramid of Giza is the world's tallest artificial structure with history of 3,800 years. The pyramid consists of 2.3 million of stones, of which the largest one lied in the king's chamber, weighing between 25-28 tons, shipped from 800 kilometers away in Aspen Wan . Until now, experts still do not know how people moved every piece of stone back in that time. (Source: people.com.cn) |