This is Shibaozhai, a fortress tower built on the side of a sharp cliff on a mountain in the middle of Yangtze River with over 300 years of history. Bulit by an outlaw it used to be a formidable defense structure in the middle of the river assuming a high position. But with the construction of Three Gorges Dam, the water level raised dramatically and in order to protect the building, stone walls are built surrounding the rock to provide support and keep the water out. It is now known affectionately as the largest Bonsai in the world.