A view of Midway Geyser Basin in Yellowstone National Park, Wyoming, US. Although it is much smaller than the other basins found alongside the Firehole River, it contains two large features, Excelsior Geyser and Grand Prismatic Spring. 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]
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