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Morning Glory pool at Yellowstone National Park, Wyoming, USA.
Vivid colors of the Black Pool in the Yellowstone National Park, Wyoming
Steaming Geysers and thermal pools at Yellowstone National Park
Vibrant colors around a hot spring in Yellowstone National Park from thermophilic bacteria growing along the springs edge.
Geysers at Midway Geyser Basin Trailhead, Yellowstone National Park.
Sunset Lake under cumulus clouds in Black Sand Basin in Yellowstone National Park in Wyoming United States
Firehole Spring on the Firehole Lake Drive in Lower Geyser Basin at Yellowstone National Park, Wyoming.
Image of Steam covers iconic Grand Prismatic Spring in Yellowstone winter
Closeup of Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA
Pattern and structure of water drains from geysers around Old Faithful Snow lodge and steaming geysers. In Yellowstone National Park. USA
Colorful pattern of the Black Pool, Yellowstone National Park
Yellowstone National Park turquoise thermal pool, Wyoming, USA.
Norris Geyser Basin, Yellowstone National Park.
Detail of one of the hot springs that are located at Yellowstone National Park.
Black sands geyser basin in the Yellowstone National park, USA
Jewel Geyser at Biscuit Basin on Upper Geyser Basin in Yellowstone National Park, Wyoming
Geothermal area
Old Faithful Yellowstone National Park, Wyoming, USA.
Image of Macro of Yellowstone spring with colorful alkaline waters
freedom girl walking at Yellowstone State Park
West Thumb Geyser Basin in Yellowstone National Park in Wyoming, USA: The Majestic Hot Springs formed by a large volcanic explosion 150,000 years ago
Geysers and Hot Springs at Yellowstone
A geyser in Wyoming Yellowstone national park
Grand Prismatic Spring in Yellowstone National Park
Black Diamond Pool Geysers at Yellowstone National Park. Biscuit Basin Trail.
Reflections of the blue sky and white clouds in the river
Close up of a thermal feature and its contrasting colors in Yellowstone National Park, MT/WY.  The white line is the hardening minerals that bubble from the deep waters of this volcanic landscape.  The orange are living thermophil that must have high temperatures to thrive.
Yellowstone Lake and Thumb Geyser view in Yellowstone National Park, Wyoming, USA.
The aquamarine colors of this Yellowstone hot spring are reflections of bacteria that thrive in the hottest waters of the park.
Thermophilic Microbial Mat at Norris Geyser Basin in Yellowstone National Park, Wyoming. These olive-green mats are the result of cyanobacteria mixed with iron.
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