AllMovie

The Great Wall of China covers 40,000 miles and remains the largest man-made structure in the world. During this segment of the three-part Mysteries of Asia series, the filmmakers travel to different parts of the wall, including some that tourists cannot visit. They interview local authorities and historians who reveal that the Great Wall is not just one large wall but actually more than 20 walls that were built over 2,000 years. Though the wall was partially built to help keep out enemies, Chinese rulers also used it to keep their people from trying to leave. This Learning Channel production also profiles the emperors who oversaw the construction of different parts of the Great Wall.