Yellowstone: Top Photos

The caldera that powers half the world's geysers

A herd of bison walk in snow behind Fort Yellowstone. Bison at Fort Yellowstone Keywords: yellowstone national park; mammals; wildlife; bison; bison bison; 20140330-ndh
A herd of bison walk in snow behind Fort Yellowstone. Bison at Fort Yellowstone Keywords: yellowstone national park; mammals; wildlife; bison; bison bison; 20140330-ndh © Neal Herbert, Public domain, via Wikimedia Commons

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