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| <-- Dragon's Mouth Spring at the Mud Volcano trail. |
| Grand Canyon of the Yellowstone. |
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| <-- Sulfur Caldron. Notice the two guys working next to one of the most acidic springs in Yellowstone. A close-up below. |
| "Parking Lot Pool" formed in May 1999. |
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| Bison hang out near the road. |
| Click any picture for a link to a relevant site. |
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| <-- An elk herd. |
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| People should stay a minimum distance of 25 yards from wildlife. Someone forgot to tell the bison. |