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Montana - Western USA, Sky, Caldera, Cloud - Sky, Dramatic Sky
Blue Star Spring in Yellowstone National Park, Wyoming.
Ooyunuma in Noboribetu
Bumpass Hell, the largest and most popular hydrothermal area, in Lassen Volcanic National Park, California
Hachimantai Kagaminuma with melting snow
Wonderful Blue Lake and Yellowstone, Wyoming, USA,Nikon D3x
Majestic Yellowstone lake
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.
hot spring in yellowstone national park
Beauty Pool, located in the Upper Geyser Basin of Yellowstone National Park, is a striking geothermal feature renowned for its vibrant hues and intricate formations. The pool, which measures about 16 feet in diameter, showcases a brilliant spectrum of colors ranging from deep turquoise in the center to vivid yellow and orange near the edges. These colors are a result of thermophilic microorganisms that thrive in the hot, mineral-rich waters.
Kamado Jigoku (Cooker Hell) pond in autumn, which is one of the famous natural hot springs viewpoint, representing the various hells in Beppu
Black Diamond Pool Geysers at Yellowstone National Park. Biscuit Basin Trail.
Hot springs in California.
Thermal outdoor pool in the Snowy Mountains
Russia. Kuril Islands. View of the baths of the thermal spring (Boiling river) near the volcano Baranovsky, the water temperature in which reaches 42 degrees.
Nuorilang Waterfall at Jiuzhaigou National Park Sichuan, China
Kamado jigoku (hell) in Beppu, Oita, Japan
Thermophilic Microbial Mat at Sapphire Pool in Biscuit Basin of Yellowstone National Park, Wyoming
Impressive turquoise blue and yellow hot water hole in the national park
Visitors get a close up view of one of more than 10,000 thermal features in Yellowstone. Research on heat-resistant microbes in the park’s thermal areas has led to medical, forensic, and commercial uses.
Blue Star Spring is in the Upper Geyser Basin in Yellowstone National Park.
The  Heart Spring and the Lion Geyser Group are seen on a blue sky day in the Upper Geyser Basin with a view of the Lower Geyser Basin in the background in Yellowstone National Park.
Beautiful thermal lake view in the Yellowstone National Park in Wyoming, USA
Black Pool hot spring with Yellowstone Lake in the background
Blue Pond is a tourist destination in Hokkaido.\nIt was bluer than I expected.
Thermophilic Microbial Mat at Sapphire Pool in Biscuit Basin of Yellowstone National Park, Wyoming
View of volcanic activity and thermal sources at Bumpass Hell in Lassen National Park
Thermal Pool in Upper Geyser Basin in Winter\nYellowstone National Park
Views of Val Rosandra with the Mavic Mini drone
Markleeville, California, USA
Free Images: "bestof:PAGOSA HOT SPRINGS, COLORADO - NARA - 524217.tif Scope and content General notes 524217 Local identifier 106-WB-266 Smithsonian Institution 1846 - NARA-Author"
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