Great Wall of China

The Great Wall of China is an assemblage of smaller walls built by various dynasties over many years. Builders erected these walls for protection from invasions by those from the north. The Great Wall itself, with a history lasting over 2000 years, measures approximately 8,800 km (5,500 miles) in length, although some of the sections lie in ruin or have disappeared altogether. It is the longest man-made structure in the world. There are several sections of the Great Wall of China that visitors find interesting. Badaling is the most popular section of the wall. It is close to Beijing and easy to access and climb.