The three gorges dam and the five locks leading up to it are amazing. Really incredible. Our boat did get a little held up and went through the first lock at 1 am. Some of us stayed up, some of us went to bed and got up again and some of us just went to bed and missed the locks. It is an incredible experience going through some of the largest locks in the world and at night it is even better with all the lights. Quite surreal. It was a lovely warm, clear night.