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photogg19: Upper Falls of the Yellowstone River
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photogg19: Grand Prismatic Spring
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photogg19: Lower Falls on the Yellowstone River
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photogg19: Norris Geyser Basin in Yellowstone National Park
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photogg19: Yellowstone's Grand Canyon
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photogg19: Madison River sunset
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photogg19: Firehole River cascade
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photogg19: Firehole River cascade