A sight that must be seen to be believed: Over 8,000 replicas of life-size warrior figures covering 22,000 square meters in underground rooms or pits located 20 feet below the surface. This project took Chinese craftsmen and laborers over 36 years to complete. During the Qin dynasty 2,000 years ago, this detailed process of creating life-size pottery figures was considered high tech and ahead of its time. It's one of China's greatest national treasures.