Mammoth Hot Springs

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Yellowstone's Mammoth Hot Springs are dubbed an "inside-out cave," with its golden travertine terraces. There are hotels and eateries built around the springs, which make a fantastic viewpoint to take photos from. While you aren't able to soak in the Mammoth Hot Springs, as the natural terraces are quite fragile, you can swim a couple miles north in the Boiling River.

Scenic