Kirkendall-Spring / Van with wheels converted van for snow travel, Norris Geyser Basin, Yellowstone National Park, Wyoming, USA, February 2011
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Jeff Vanuga / Cistern Spring in Norris Geyser Basin showing colour of blue green algae and bacteria. Yellowstone National Park, Wyoming, USA, January 2011.
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Hermann Brehm / Cistern Spring in Norris Geyser Basin, Yellowstone NP, Wyoming, USA
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Doug Wechsler / Active geysers releasing steam in Norris Geyser Basin, Yellowstone NP, Wyoming, USA
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Philippe Clement / Tourists on walkway through Porcelain Basin, part of the Norris Geyser Basin, Yellowstone NP, Wyoming, USA
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Philippe Clement / Tourists on walkway through Porcelain Basin, part of the Norris Geyser Basin, Yellowstone NP, Wyoming, USA
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Philippe Clement / Porcelain Basin, part of the Norris Geyser Basin, Yellowstone NP, Wyoming, USA
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Philippe Clement / Tourists on walkway through Porcelain Basin, part of the Norris Geyser Basin, Yellowstone NP, Wyoming, USA
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Tim Fitzharris / Norris Geyser basin with steam plumes from geysers, Yellowstone National Park, Wyoming
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Jeff Foott / Fumarole, Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, Wyoming
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Jeff Foott / Hot springs, Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, Wyoming
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Jeff Foott / Hot springs, Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, Wyoming
