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Aerial view of Grand Prismatic Spring in Midway Geyser Basin, Yellowstone National Park, Wyoming, USA. It is the largest hot spring in the United States
Thermophilic Microbial Mat at Sapphire Pool in Biscuit Basin of Yellowstone National Park, Wyoming
Aerial view of Grand Prismatic Spring in Midway Geyser Basin, Yellowstone National Park, Wyoming, USA. It is the largest hot spring in the United States
Yellowstone Grand Prismatic Spring. Wyoming. United States.
Spectacular panoramic views of Grand Prismatic Geyser in Yellowstone National Park, Wyoming Montana. Midway Geyser Basin. Great hiking. Summer wonderland to watch natural landscape. Geothermal.
Looking at Grand Prismatic Spring
Vibrant colors around a hot spring in Yellowstone National Park from thermophilic bacteria growing along the springs edge.
An image of Black Opal Diamond Pool in Yellowstone National Park
Blue hot spring hole, Midway geyser basin, Yellowstone national park, Wyoming, USA.
Grand Prismatic Spring in Yellowstone National Park in Wyoming, USA
Morning Glory Pool, Yellowstone National Park, Upper Geyser Basin, Wyoming
Thermophilic Microbial Mat at Sapphire Pool in Biscuit Basin of Yellowstone National Park, Wyoming
A section of the Grand Prismatic Spring taken from the \
Black Diamond Pool Geysers at Yellowstone National Park. Biscuit Basin Trail.
Sapphire Pool hot spring  is one of the most beautiful blue pools in the park. Biscuit Basin, Yellowstone National Park, Wyoming
Geothermal area of Leirhnjukur, Krafla lava fields, Iceland
The Grand Prismatic Spring in Yellowstone National Park is the largest hot spring in the United States, and the third largest in the world
Majestic Yellowstone lake
Grand Prismatice Spring in Yellowstone National Park with tourists viewing the spectacular natural scene
Closeup of Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA
Norris Geyser Basin, Yellowstone, Wyoming - United States of America
Grand prismatic spring at sunny blue sky, , Yellowstone National Park, USA.
Norris Geyser Basin at Yellowstone National Park
Black Pool hot spring with Yellowstone Lake in the background
Sapphire Pool Yellowstone National Park, Wyoming in summer
Biscuit Basin is a geothermal area named for the biscuit-like silica formations that once surrounded its most famous feature, Sapphire Pool. After an eruption in 1959, many of the biscuit formations at Sapphire Pool were destroyed. It's a relatively small geothermal area compared to others in the park. The entire basin can be explored via a boardwalk loop that is approximately 0.7 miles (1.1km) long.
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.
Black Diamond Pool Geysers at Yellowstone National Park. Biscuit basin trail.
The World Famous Grand Prismatic Spring in Yellowstone National Park,USA
Yellowstone National Park
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