Yellowstone: Top Photos

The caldera that powers half the world's geysers

Old Faithful Geyser, Old Faithful Group, southeastern Upper Geyser Basin, Yellowstone Hotspot, northwestern Wyoming, USA. Geysers are hot springs that episodically erupt columns of water. They occur
Old Faithful Geyser, Old Faithful Group, southeastern Upper Geyser Basin, Yellowstone Hotspot, northwestern Wyoming, USA. Geysers are hot springs that episodically erupt columns of water. They… © James St. John, CC BY 2.0, via Wikimedia Commons

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