Dragons Mouth hot spring in Mud Volcano area of Yellowstone National Park in winter
Dragons Mouth; hot spring; hot; water; Mud Volcano; Yellowstone; National Park; winter; Wyoming; travel; tourism; tourist attraction; belch; turbulent; noisy; cavern; mouth; hydrogen sulfide; carbon dioxide; steam; heat; spring; rust; red; rock; wave; burp; loud; roar; geothermal; snow; thermophiles