Yellowstone: Top Photos

The caldera that powers half the world's geysers

A herd of bison are in a sagebrush field. Bison herd, Hayden Valley Keywords: yellowstone national park; mammals; wildlife; bison; bison bison; 20150617_ndh-yell-pano-bison-hayden
A herd of bison are in a sagebrush field. Bison herd, Hayden Valley Keywords: yellowstone national park; mammals; wildlife; bison; bison bison; 20150617_ndh-yell-pano-bison-hayden © Neal Herbert, Public domain, via Wikimedia Commons

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