Visitor watching Pump Geyser in the upper geyser basin. Yellowstone National Park, Wyoming, USA

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Photo credit: © John Trax / Alamy / Afripics
License: Licensed
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Keywords: area, basin, feature, geothermal, geyser, landscape, national, natural, nature, outdoor, outdoors, park, pump, scenery, scenic, service, thermal, tourism, travel, traveled, traveling, upper, usa, wilderness, wyoming, yellowstone