The Great Wall of China is one of the most remarkable structures ever built. It runs from East to West across the country for 4,163 miles (6,700 km). The Great Wall was built by thousands of people in many small, unconnected sections for protection against invaders. The walls were joined after the unification of China, under the Qin Dynasty Emperor Qin Shihuang. The Great Wall of China is now a favorite tourist attraction. Have students research more about how it was built and what it looks like. Have students build the Great Wall as a team!