Taken inside one of the watch towers along the Great Wall at Mutianyu. In constructing the watch towers and signal towers, communications between army units and visibility were critical issues, therefore placement of openings inside these towers were of utmost importance. Besdies, it was a nice place to cool down after climbing those million and one steps in the pounding sun with over 30 lbs of camera equipment and a heavy tripod on our backs! Did I say there were no hot dog stands along the way???