The Midway Geyser Basin's Grand Prismatic Spring is the largest hot spring in Yellowstone and one of the largest hot springs in the world. Measuring approximately 370 feet in size and around 121 ...
BEN PIERCE, Chronicle Outdoors Editor Oct 30, 2014 Oct 30, 2014 Deep in the backcountry of Yellowstone National Park lies a thermal pool nicknamed “Gabby Spring” by researchers from Montana ...
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