"Castle Geyer, Yellowstone National Park, Wyoming, USA"

"Grand Geyser eruption, Yellowstone National Park, Wyoming, USA"

"Morning Glory Pool, Yellowstone National Park, Wyoming, USA"

"Sign, Yellowstone National Park, park entrance, Wyoming, USA"

"Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA"

"Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA"

"Northeast Entrance, Yellowstone National Park, Wyoming, USA, America"

"Heart Spring, Upper Geyser Basin, Yellowstone National Park, Wyoming, USA"

"Heart Spring, Upper Geyser Basin, Yellowstone National Park, Wyoming, USA"

"Yellowstone National Park, sign at the Northeast Entrance, Wyoming, USA, America"

"Lower Falls at the Grand Canyon of the Yellowstone, Canyon Village, Yellowstone National Park, Wyoming, USA"

"West Thumb Geyser Basin, Yellowstone Lake, Yellowstone National Park, Wyoming, USA"

Bison (Bison bison), Yellowstone National Park, Wyoming, USA, North America

Bison (Bison bison), Yellowstone National Park, Wyoming, USA, North America

"Porcelain Springs, Norris Geyser Basin, Yellowstone National Park, Wyoming, USA"

"Travertine terraces, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA"

"Trail Springs, Main Terrace, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA"

Coyote (Canis latrans), Geyser behind, Yellowstone National Park, Wyoming, USA, North America

"Lower Falls, view from Lookout Point, Grand Canyon of the Yellowstone River, North Rim, Yellowstone National Park, Wyoming, USA"

"Black Growler Steam Vent, Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, Wyoming, USA"

"Herd of bison, American Bison (Bison bison), Lamar Valley, Yellowstone National Park, Wyoming, USA"

"Lower Falls with the Red Rock Trail, Grand Canyon of the Yellowstone River, view from North Rim, Yellowstone National Park, Wyoming, USA"

"Grotto Geyser, Yellowstone National Park, Wyoming, United States, North America"

"Golden-mantled Ground Squirrel (Spermophilus lateralis), Yellowstone National Park, Wyoming, United States of America, USA"

Vacation in Yellowstone 2004 Linda Braucht (20th C. American) Computer graphics

"Gibbon Falls, Yellowstone National Park, Wyoming, USA"