Han Dynasty - Chinese Rulers

The Han dynasty built a great wall which has resisted two thousand years of erosion in the barren desert. Remnants of firewood, used to send smoke signals along that wall, still survive because of the Gobi’s dry climate. So do letters which men, including forced laborers, left behind - opening a window into the lives of people who lived so long ago.

To step back in time, and explore that ancient world, take a look at this video clip from Secrets of the Great Wall (by Discovery Communications).