Lone Tourist at Yellowstone Geyser

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Tourists takes picture at geyser basins in Yellowstone National Park. Yellowstone is the nations first National Park, it spans three states Yellowstone is the nations first National Park, it spans three states.<br />
The Yellowstone Caldera is the largest volcanic system in North America. It has been termed a "supervolcano" because the caldera was formed by exceptionally large explosive eruptions.<br />
There are 300 geysers in Yellowstone and a total of at least 10,000 geothermal features altogether. Half the geothermal features and two-thirds of the world's geysers are concentrated in Yellowstone.
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