Baotu spring, also known as sill spring, is the source of the water.The three grottoes of baotu spring were complicated with the sound of "the spring and the spring".Spring all year round constant at 18 ℃ or so.In the severe winter, the water vapor in the water, like a thin layer of smoke, on one side of the pool deep and deep sparkling;On one side is a pavilion painted, carved beams and paintings, creating a wonderful fairyland