"Nothing ever conceived by human art could equal the peculiar vividness and delicacy of color of these remarkable prismatic springs. Life becomes a privilege and a blessing after one has seen and thoroughly felt these incomparable types of nature's cunning skill."
- Ferdinand Hayden (1871)
Though it appears photo-shopped, the science is real @ Grand Prismatic Spring in Yellowstone NP. Measuring approximately 370 feet (112.8 m) in diameter and over 121 feet (37 m) deep, it's the largest geothermal hot spring existing in the United States.
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