The heavy runoff from the 200-by-300-foot (61 by 91 m) wide Excelsior Geyser to the Firehole River, with a speed of 4,000 US gallons (15,000 L; 3,300 imp gal) per minute. Thermophilic bacteria stain the riverbank into the orange color. As the first national park in the world, Yellowstone National Park is well-known for its wildlife and many geothermal features. [Photo by Xu Lin / China.org.cn]
Go to Forum >>0 Comment(s)