Dragon's Mouth Spring in the Mud Volcano thermal area in Yellowstone National Park, Wyoming, USA Boiling water rolls out of a small cave-like opening, steam bellowing from within. Bizarre noises emit from the opening, making the idea of a dragon's mouth rather believable.
Bisons at the shore of the Yellowstone River in Yellowstone National Park, Wyoming, USA
Small group of bisons grazing near the Yellowstone River in Yellowstone National Park, Wyoming, USA
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