The Great Wall of China describes an over 6,000-kilometer path through the Middle Kingdom. The wall stretches from the Pacific Ocean to the deserts of northwestern China. Built originally as a border fortification to protect the Chinese empire against the nomadic horse-riding peoples to the north, the first wall-like border fortifications were most likely built during the fifth century B.C. The Wall was constructed over the course of 2,000 years.

The wall as we are accustomed to seeing it took its form during the Ming dynasty, when the final phases of construction were completed. The most famous section of the wall, which has been reconstructed, lies 85 kilometers from Beijing. China's most-visited cultural monument is only a one-hour drive from the Chinese capital.

Traveling the Wall involves following endless steps up and down, a sweaty but worthwhile undertaking. Here in Badaling the Wall is an average of eight and a half meters high and six meters wide - wide enough to post five horses or 10 soldiers side by side along it. Today the state is continually financing restoration and reconstruction of the Great Wall of China. It's a cultural monument and the largest architectural structure ever built by humankind.