A geyser erupts in the Lower Geyser Basin of Yellowstone National Park.
Visitors walk the boardwalk surrounding the vibrantly colored Grand Prismatic Spring in the Midway Geyser Basin in Yellowstone National Park.
A red fox holds a Uinta ground squirrel in its mouth; a prize from a successful hunting expedition.
A Bighorn Sheep ram suns itself on a ridge in the northern range of Yellowstone National Park.
Explore thermal features at Mammoth Terraces in the northern range of Yellowstone National Park.
