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The Sulphur Caldron in Yellowstone National Park is one of the park’s most acid hot springs, with yellow and turbulent waters reminding one of an evil witch’s brew, USA, UNESCO World Heritage Site
Spectacular panoramic views of West Thumb Geyser Basin in Yellowstone National Park, Wyoming Montana. Yellowstone Lake. Great hiking. Summer wonderland to watch wildlife and natural landscape. Geothermal.
Bumpass Hell area of Lassen Volcanic National Park in California. Part of the Cascade Mountain Range. Dried hot springs next to the Boiling Springs Lake. Dried mud forming cracks.
Norris Geyser Basin landscape in Yellowstone national park
Yellowstone National Park
The numerous boiling mud springs characterize some areas of Yellowstone Park and testify to the volcanic character of the area.
Shrouded in Snow Fog and Steam Witches Basin is Full of boiling caldrons, hot gushing springs, fumeroles and vents.  Backcountry skiers enjoy Witch Creek splenders while staying the night and bathing in the hot stream Early March 1986.
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.
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Roaring Mountain is a geothermal feature known for its numerous fumaroles, or steam vents, that emit a continuous roar, especially audible in the early 20th century, hence its name. Located along the road between Mammoth Hot Springs and Norris Geyser Basin, the mountain's barren, gray slopes are a stark contrast to the surrounding landscape, created by acidic gases that prevent vegetation growth.
Castle Geyser, a famous thermal feature, erupts in Yellowstone's Upper Geyser Basin not far from Old Faithful Geyser. Heated water run off produces colonies of colorful thermophilic organisms as seen in the foreground.
Terraces at Mammoth Hot Springs in Yellowstone in Winter
Minerva Terrace in Yellowstone National Park, Wyoming
Yellowstone NP nature
Thermal spring, one of many nature wonders in the Yellowstone National Park, Wyoming, USA. Feature created over thousands of years as hot water from the spring cooled and deposited colorful calcium carbonate.
Mammoth Hot Springs in Yellowstone National Park, Wyoming Montana. Great hiking. Summer wonderland to watch wildlife and natural landscape. Geothermal.
Land of Colors, Yellowstone, Wyoming - United States
Thermal area of limestone and travertine formations in 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.
Colorful geyser erupting at Biscuit Basin in Yellowstone National Park.
Geothermal pool in winter Yellowstone National Park steaming
Steaming mud at Lower Geyser Basin, Yellowstone National Park, Wyoming, USA
Mud Volcano, Mud Volcano Area, Scenic Landscapes of Geothermal activity of Yellowstone National Park, USA, UNESCO World Heritage Site
Mud Volcano in Yellowstone National Park is a highly active geothermal feature located near the Yellowstone River, just north of Yellowstone Lake. This area is known for its bubbling mud pots and steam vents, which are fueled by acidic, sulfur-rich gases rising from deep within the earth. The most notable feature, the Mud Volcano itself, is a churning pool of hot, muddy water that gives off a strong smell of sulfur. It was once a large cone-shaped geyser before a powerful eruption in the late 19th century reduced it to its current, more subdued form. The area around Mud Volcano is part of the larger Hayden Valley thermal area.
Geyser and hot spring in old faithful basin in Yellowstone National Park in Wyoming
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.
Special landscapes made with film camera in USA
Castle Geyser Eruption in Winter \nYellowstone National Park
Free Images: "bestof:Yellowstone volcano - ash beds.jpg geology Yellowstone Volcano Ashbeds of earlier eruptions Source http //pubs usgs gov/fs/2005/3024/ PD-USGov Maps of"
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