Yellowstone: Top Photos

The caldera that powers half the world's geysers

Clouds of steam billow from a rock cone Old Faithful Geyser Keywords: media quality; old faithful; geyser; yell
Clouds of steam billow from a rock cone Old Faithful Geyser Keywords: media quality; old faithful; geyser; yell © NPS/Jim Peaco, Public domain, via Wikimedia Commons

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