<p>Visitors to Yellowstone National Park watch the eruption of the Grand Geyser in the park's Upper Geyser Basin. Established on March 1, 1872, in Wyoming, Idaho, and Montana, Yellowstone contains the greatest concentration of the world’s hot springs and geysers.</p>
Grand Geyser, Yellowstone, Circa 1912
Visitors to Yellowstone National Park watch the eruption of the Grand Geyser in the park's Upper Geyser Basin. Established on March 1, 1872, in Wyoming, Idaho, and Montana, Yellowstone contains the greatest concentration of the world’s hot springs and geysers.
Photograph by Stereo-Travel Co., Library of Congress
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