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Castle Geyser erupting in Yellowstone in strong back light.

Thermophilic Microbial Mat at Sapphire Pool in Biscuit Basin of Yellowstone National Park, Wyoming

Norris Geyser Basin, Yellowstone, Wyoming - United States of America

Yellowstone National Park

$A section of the Grand Prismatic Spring taken from the \$

Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA

Stunning natural land features

Hot springs are the most common hydro-thermal features at Yellowstone National Park. They vary from frothing mocha-like boiling water to clear and calm pools of tremendous depth.

Mammoth Hot Springs - Yellowstone National Park - Wyoming - USA

Billions of thermoacidophiles live in these waters which are 10 times more acidic than lemon juice and almost as much as battery acid. They convert the pool's hydrogen sulfide gas into sulfuric acid which breaks soil and rock into mud.

The World Famous Grand Prismatic Spring in Yellowstone National Park,USA

Norris Geyser Basin in Yellowstone in Winter

colorful landscape of the midway geyser basin area of yellowstone national park.

Utah, USA-September 10, 2011: The Yellow Stone National Park is one of the Natrual Wonders in the world. Here is the beautiful scenery of the National Park.

Grand Prismatic Spring in Yellowstone National Park Wyoming, horizontal

Majestic Yellowstone lake

overview prairie and rivers in Yellowstone National Park in Wyoming

Thermophilic Microbial Mat at Sapphire Pool in Biscuit Basin of Yellowstone National Park, Wyoming

View of geothermal geyser seen from Yellowstone National Park, Wyoming.

Bumpass Hell, the largest and most popular hydrothermal area, in Lassen Volcanic National Park, California

Beautiful thermal lake view in the Yellowstone National Park in Wyoming, USA

Grand prismatic spring at sunny blue sky, , Yellowstone National Park, USA.

Beautiful vegetation of Yellowstone National park

Erupting geyser at Norris Geyser Basin, Yellowstone National Park, Wyoming, USA

Yellowstone River winding through the summer landscape of Hayden Valley in Yellowstone National PArk Wyoming, USA.

Thermophilic Microbial Mat at Norris Geyser Basin in Yellowstone National Park, Wyoming. These olive-green mats are the result of cyanobacteria mixed with iron.

Grand Prismatic Spring in Yellowstone National Park with tourists viewing the spectacular natural scene

Midway Geyser Basin in Yellowstone National Park.

Steamboat geyser in Norris Basin in Yellowstone National Park with hot steam, vapor, blue hot springs and mountains

Yellowstone NP nature

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