Who knew that it ended at the sea? It does, at the Yellow Sea, just athwart what we now call the Korean Peninsula. It is over 13,000 miles long, running from east to west. I do not know how successful a protection it was, or from whom, nor have I anything to say of its ramifications today. Suffice it to say that these pictures describe a wall of great elegance, but too long to walk, and surely not in high heels. But here are shots of portions of the wall that we rarely see, and without the usual crowd of tourists.