September 12, 2009 - Morning Glory Pool Hot Spring, Upper Geyser Basin geothermal area, Yellowstone Caldera, Yellowstone National Park, Wyoming.

morning glory pool unesco usa upper geyser basin wyoming yellowstone caldera yellowstone national park beauty in nature color image colorful day earth science famous places geography geology geoscience geothermal area geyser hole horizontal hot springs lake landscape national park natural landmark nature nature reserve one person outdoors photography physical geography scenic thermal pool tourist travel destinations vibrant water