The sun sets over a frigid Billings Montana.
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Yellowstone Abstract 1
Black Pool is a hot spring in the West Thumb Geyser Basin of Yellowstone National Park. The pool appeared black up until 1991 when the pool heated up and killed the bacteria that caused the black appearance. Now it is a beautiful cyan color but retains the name "Black Pool".
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Castle Geyser Rainbow
A rainbow forms in the mist of the boiling water and steam erupting from Castle Geyser in Yellowstone National Park.
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