Suzhou's city wall is unique among all city walls in China. It has two layers of "walls": one structured with bricks and another formed by a water channel that encircles the brick wall and connects to the waterways north to Beijing and south to Hangzhou.
I have been to the Great Wall in Beijing & Tianjin. Both very different sections.: The great wall of China Beijing.I would love to go see this place one day. We currently live near the one in Tianjin. I prefer it over Beijing.