Excelsior Geyser is located in Midway Geyser Basin, adjacent to the spectacular Grand Prismatic Spring. The geyser may have ...

Some of the largest volcanic eruptions on the planet have occurred at Yellowstone National Park, and scientists have ...

National Geographic’s photography community is now on Instagram at @NatGeoYourShot. Please follow us there for the latest photos from the community and tag your photos #YourShotPhotographer for ...

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