Introduction to Bailongtan: is in the shape of a basin, divided into three pools, two pools and three pools. The three pools of different heights are almost distributed on a vertical line, forming a wonderful landscape of stacked pools and hanging brocades. The peculiarity is that The Tan is closed every year in late autumn, with water only up to the ankles, and fine sand below. The Tan is automatically opened regularly in the spring, when the gravel is gone, clear springs rise up, and the water in the Tan is unfathomable, flowing down into a stream.