Yellowstone National Park
Fumarole in a lay-by
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Yellowstone River and thermal activity
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At Sulphur Cauldron - note the buffalo
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At Sulphur Cauldron - hot spring
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Informative Notice
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At Sulphur Cauldron - the cauldron
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At Sulphur Cauldron
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Mud volcano area
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Mud volcano area - Sour Lake
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Mud volcano area - buffalo at Sour Lake
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Buffalo at Sour Lake
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Mud volcano area - what was the Mud Volcano
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Mud volcano area - Dragons Mouth Spring
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Yellowstone Lake
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Grand Tetons
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