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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.
Thermophilic Microbial Mat at Sapphire Pool in Biscuit Basin of Yellowstone National Park, Wyoming
A serene riverbank showcases vibrant greens of grass along the water's edge, with gentle ripples reflecting the clear blue sky on a bright afternoon.
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Norris Geyser Basin, Yellowstone, Wyoming - United States of America
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA
Emerald Pool at Black Sand Basin  in Yellowstone National Park_2550
Yellowstone wilderness recreation area features canyons, rivers, waterfalls, lush forests and hot springs.
Beautiful vegetation 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.
Steaming hot volcanic vent by the lake at Yellowstone National Park
Yellowstone River view in Yellowstone National Park, Wyoming, USA.
colorful landscape of the midway geyser basin area of yellowstone national park.
South Scalloped Spring is known for its beautifully scalloped edges and clear, blue water. This hot spring's distinctive scalloped formations are created by mineral deposits, which build up around the edge of the spring over time.
green hot spring thermal pool in Yellowstone National Park, USA
Grand Prismatic Spring hot water runoff  at Midway geyser basin in Yellowstone National Park in Wyoming in western USA. This is thermal runoff from the Grand Prismatic Spring and other springs and geysers in this basin. Hereby cities are Jackson Hole, Wyoming, West Yellowstone, Montana, Gardiner, Montana and Bozeman and Billings, Montana
Grand Prismatic Spring in Yellowstone National Park, USA
Yellowstone National Park
Yellowstone National Park sits on top of a dormant volcano and is home to more geysers and hot springs than any other place on earth. Wonders abound at this truly unique national park, from sites like the Yellowstone Grand Canyon to wildlife like America's largest buffalo herd, grizzly bears, and wolves.
Mount Rundle in Banff National Park in the Canadian Rockies
scenery in the Rocky Mountains, Curb Trail
Orange-blue Colored Black Sand Basin lake in Yellowstone National Park, Wyoming, USA.Nikon D3x
A landscape photo of forest and reflections on water by the lake in Usak
Silver Lake in the beautiful natural surroundings of Salt Lake City, Utah USA.
Hot geothermal spring at the Upper Geyser basin. Orange thermophile bacteria mats. Yellowstone National Park, Wyoming, USA.
Culvert Geyser view of Old Faithful Geyser Erupt in Yellowstone National Park, Wyoming, USA.
Fumarole and geyser environment in Yellowstone National Park
Unique geothermal features where hot springs deposit iron-rich minerals, creating reddish-brown formations resembling molten chocolate. These iron-oxide deposits are formed as the hot, mineral-laden water flows out and cools, precipitating the iron and other minerals. They were first documented by members of the Hayden Geological Survey of 1871, led by geologist Ferdinand V. Hayden.
Floating water lilies in bloom and tall marsh grasses with reflections of the trees line in the blue lake water. A summer day in the San Juan Mountains, Colorado.
Yellowstone National Park
Free Images: "bestof:NymphingTheGardnerRiver2005.jpg Nymphing The Gardner River Yellowstone National Park September 2005 Own 2005-09 Mike Cline Fly fishing Angling in Yellowstone"
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