The Great Wall of China is a 13,000-mile dragon of earth and stone that winds its way through the countryside of China. As it turns out, the wall's history is almost as long and serpentine as its structure. Megan Campisi and Pen-Pen Chen...

A brief description of the building of the Great Wall of China. Why it was built, who built it, its measurements, what building materials were used, and its purpose.