Thanks to Theron Rogers in Georgia for pointing out a "minor* error in my last posting. The Great Wall is 3,720 *miles* long, not 3,720 feet. Actually, nobody is sure exactly how long the remaining part of the wall is. As far as you can see from Balaling for sure. While some portions north of Beijing and near tourist centers have been preserved and even reconstructed, other parts have been destroyed or are in extremely remote areas of the country. Parts of the wall will probably continue to be discovered for many years.