The main Great Wall of China stretches approximately 5,500 miles along the southern edge of Inner Mongolia. Explorer experts state that it takes 18 months to walk its entire length. It was constructed during the Ming dynasty in the 14th and 15th century, and is sometimes called the Ming Wall. read more
You can't walk from one end to the other. It's broken into widely separated segments, some of which I'm not so sure is open to the public. read more