Female Black bear with cub (Ursus americanus), Yellowstone NP, Wyoming, USA Grand Canyon of the Yellowstone river, Yellowstone National Park, Wyoming, USA Old Faithful geyser erupting at sunset, Yellowstone National Park, Wyoming, USA Mule deer (Odocoileus hemionus), Yellowstone NP, USA Morning Glory Pool with tourists on boardwalk, Yellowstone NP, Wyoming, USAMormon Row barn, Grand Teton NP, Wyoming, USATourists at the Castle geyser, Yellowstone National Park, Wyoming, USA Regrowth of Lodgepole pine trees (Pinus contorta latifolia) between standing dead trees, killed after fires, Yellowstone NP, Wyoming, USAAmerican beaver dam and den (Castor canadensis) Grand Teton NP, Wyoming, USA