Colorful cyanobacteria mats surround the Grand Prismatic Spring, the largest hot spring in Yellowstone National Park and third largest in the world. Grand Prismatic is about 250 by 300 feet in size, averages 160 degrees Fahrenheit and is up to 160 feet deep. The bright colors around the spring are from microorganisms growing in the hot water runoff. The Grand Prismatic Spring is part of the Midway Geyser Basin Excelsior Group in Yellowstone, Wyoming.

• Contributor: Richard Ellis / Alamy Stock Photo
• Image ID: 2C3F4NN
• File size: 123 MB (5.9 MB Compressed download)
• Releases: Model - no | Property - no
• Dimensions: 8029 x 5353 px | 68 x 45.3 cm | 26.8 x 17.8 inches | 300dpi
• Date taken: 12 August 2018
• Location: Yellowstone National Park, Wyoming, USA

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This image could have imperfections as it’s either historical or reportage.