The Grand Prismatic Spring in Yellowstone National Park is quite the sight, if you manage to fight off the heard of selfie sticks on the wooden walking path without being knocked over into the spring you are doing well. This was a fisheye shot taken in the center of the boardwalk type path that leads out into the Midway Geyser Basin in Yellowstone. The air was still quite chilly in the park so there was a bit of steam at the prismatic but there still was quite a good view of this remarkable natural spring. The vivid colors in the spring are the result of pigmented archaea in the microbial mats that grow around the edges of the mineral-rich water. In the summer, the mats tend to be orange and red, whereas in the winter the mats are usually dark green.
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