The Great Wall of China
- Became a UNESCO World Heritage Site in 1987
- Stretches approximately 6700 km (4163 miles) east-west across China
- Built during various periods in different sections, and did not become the "Great" Wall until the Qin Dynasty (208 BCE) joined several sections of the wall together
- The majority of the Great Wall that can be seen today was built during the Ming Dynasty in the 17th century
- Preceded by walls built as early as the 3rd century BCE