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Emerald Pool at Yellowstone Royalty Free Stock Photo

Emerald pool in the black sand basin, yellowstone Royalty Free Stock Photo

Emerald Pool hot spring in the Black Sand Geyser Basin in Yellowstone National Park in Wyoming USA Royalty Free Stock Photo

Trees reflecting in the Emerald Pool hot spring in the Black Sand Geyser Basin in Yellowstone National Park USA Royalty Free Stock Photo

The Emerald Pool hot spring geyser in Black Sand Basin in Yellowstone National park Royalty Free Stock Photo

Emerald pool in black sand basin in Yellowstone national park, Wyoming Royalty Free Stock Photo

Emerald Pool at Black Sand Basin, Yellowstone NP

Emerald Pool hot spring sign in the Black Sand Geyser Basin in Yellowstone National Park in Wyoming USA Royalty Free Stock Photo

Emerald Pool in Black Sand Basin in Yellowstone Royalty Free Stock Photo

Emerald pool and its runoff in Black sand basin, Yellowstone national park Royalty Free Stock Photo

Hot steam rising off Emerald Pool hot spring in the Black Sand Geyser Basin in Yellowstone National Park in Wyoming USA Royalty Free Stock Photo

One of the main attractions at Black Sand Basin. The color is the result of lower temperatures which have allowed yellow bacteria and algae to grow on the lining of the pool. The clear water of the pool reflects the blues but absorbs the other hues of the color spectrum. The combination of blue and yellow then produces green.