There are a few places where you can climb on the Great Wall. We went to Ju-Yong Pass. It was about 1000 metres to the high point we climbed to. The steps, and a lot of the parts of the wall, had been rebuilt over time so were not original but we were still able to appreciate the magnanimity of this famous construction. It was a strenuous climb and you had to remain focused because the steps were not even heights or depths.