"Two Bisons (Bison bison), Yellowstone National Park, Wyoming, United States, North America"

"Bison crossing the sinter crust of Grand Prismatic Spring, Yellowstone National Park, Wyoming, United States, North America"

"Bison crossing the sinter crust of Grand Prismatic Spring, Yellowstone National Park, Wyoming, United States, North America"

"Pond at the Beaver Ponds Trail, Yellowstone National Park, Wyoming, United States, North America"

"Bear track, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States, North America"

"Bison (Bison bison) in Nez Perce Creek, Yellowstone National Park, Wyoming, United States, North America"

"Grizzly (Ursus arctos horribilis), female with two cubs, Yellowstone National Park, Wyoming, United States, North America"

"American Elk or Wapiti (Cervus canadensis), adult male, Yellowstone National Park, Wyoming, United States, North America"

"Grizzly (Ursus arctos horribilis), female with two cubs, Yellowstone National Park, Wyoming, United States, North America"

"Sinter terraces of the Lower Terrace, Mammoth Hot Springs, Yellowstone National Park, Wyoming, United States, North America"

"Sinter terraces of the Lower Terrace, Mammoth Hot Springs, Yellowstone National Park, Wyoming, United States, North America"

"Steam rises above the hot springs, Firehole Lake Drive, Yellowstone National Park, Wyoming, United States, North America"

"Grand Canyon, Grand Canyon National Park, Arizona, United States, North America"

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

"Canyon, Mesa Verde National Park, Colorado, United States, North America"

Artists Paint Pots, Yellowstone National Park, Wyoming, USA, North America

"Grand Canyon at sunset, Grand Canyon National Park, Arizona, United States, North America"

"Grand Canyon of the Yellowstone Canyon, Yellowstone National Park, Wyoming, USA"

"View from Aritist Point towards Lower Falls waterfall and Yellowstone River, Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming, USA, United States of America, North America"

"Rock formations, hoodoos, Bryce Canyon National Park, Utah, United States, North America"

"Bright Angel Canyon at dawn, South Rim, Grand Canyon National Park, Arizona, United States, North America"

"Geyser, hot spring, steam, Clepsydra Geyser, Lower Geyser Basin, Yellowstone National Park, Wyoming, USA, United States of America, North America"

"Coloured rock pyramids, Bryce Canyon National Park, Utah, United States, North America"

"Geyser, hot spring, steam, Clepsydra Geyser, Lower Geyser Basin, Yellowstone National Park, Wyoming, USA, United States of America, North America"

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

"Grand Canyon of the Yellowstone, Yellowstone National Park, Wyoming, United States, North America"