Along the Great Wall there are dozens of different watch towers, some of them are unique while others can be seen at numerous locations.

So far I have only seen this kind of towers in Liaoning province – in the section between Zhuizishan and Jinniudong.

Inside there is one big room with a corridor all the way around it. In one end of the room a narrow staircase lead to the roof. Below is a sketch of one of these watch towers. Some have three windows in each side, some only two in one side and some also have a window beside the door in the main wall.

This is not like any towers I’ve seen so far in Hebei, so it might be a special Liaoning design.