Introduction to Yuanyang Pond: It is formed by lava flowing along the Wudaogou Valley and blocking the accumulated water in Wudaogou Valley. The water surface is 150 meters long, 100 meters wide, and 701 meters above sea level. The lava condensed when it met water to form slag-shaped lava, which protruded above the water surface and looked like a pair of inseparable mandarin ducks, so it was called Yuanyang Pool.