Introduction to the lake: The surface of the Asphalt Lake is round and looks like a dark gray fold. The low-lying land between the folds becomes a water collecting pond when it rains. After being baked by the heat of the sun, its texture becomes hard and people can walk on it. The pools of stagnant water contain sulfur and other minerals, which appear in different shades of green depending on their content. Visitors can reach out and feel the asphalt in the water under the guidance of a tour guide. Sulfur water is effective in treating many diseases, especially skin diseases. You can often see people soaking in the stagnant water.