The new seven wonders of the world

The Great Wall of China

Just how big is the largest construction project of all time? Large enough to be seen from space during orbit. Built as a means of defense during the reign of the Qin Dynasty (221-206 BC), the wall has survived as a hand-built monument to human achievement.

(Photo courtesy NewOpenWorld Foundation)
The Great Wall of China Just how big is the largest construction project of all time? Large enough to be seen from space during orbit. Built as a means of defense during the reign of the Qin Dynasty (221-206 BC), the wall has survived as a hand-built monument to human achievement.