The walls are of single or double structure or a trapezoidal shape; the watchtowers are oblate or round in shape; the roofs are flat or domed; thus it stands out as the most fascinating example of architecture along the entire Great Wall.

• 墙体有单面墙、双面墙、梯形石墙等；敌楼有扁形、圆形等；楼顶有平顶、穹隆顶等，因此享有“长城建筑之最”的美誉。