Poster for Yellowstone National Park,

Wyoming/Montana, USA

Old Faithful Geyser erupts approximately every 91 minutes.

The northeastern part of Yellowstone Caldera, with the

Yellowstone River flowing through Hayden Valley

Upper Falls of the Yellowstone River

Grand Canyon

Portrait of Nathaniel P. Langford from THE VIGILANTE, THE EXPLORER, THE

EXPOUNDER AND FIRST SUPERINTENDENT OF THE YELLOWSTONE PARK.

Yellowstone Lake

Lodgepole Pine

Aspen Willow

Yellowstone Sand Verbena

Bison graze near a hot spring

Pronghorn are commonly found on the grasslands in the park

Cutthroat trout

Bald Eagle

Halequin duck

Yellowstone mountain range

Winter scene in Yellowstone

Fire in Yellowstone National Park

A crown fire approaches the Old Faithful complex on September 7, 1988

Fire damage to trees giving way to new growth

in Yellowstone

Yellowstone Castle Geysir

Yellowstone north entrance