Introduction to the Sinking Pond: The Sinking Pond covers an area of ​​20 acres and is surrounded by mountains. The lake has no water inlet or outlet, but the water never dries out all year round. The frost is black and the lake is unfathomably deep. It is said that it is connected to Dongting. It is said that during the Ming Dynasty, Chen people cast a stone tablet and wrote "This lake leads directly to Dongting".