Capital City: Cheyenne

The edge of Grand Prismatics, Yellowstone National Park, USA.
The Excelsior Geyser Crater, Yellowstone National Park, USA.
Fountain Paint pots, Yellowstone National Park, USA.
The Echinus Geyser in the Norris Geyser Basin, Yellowstone National Park, USA.
Norris Geyser Basin, Yellowstone National Park, USA.
A rare example of a petrified tree still in a standing position. Yellowstone National Park, USA.
The Grand Canyon of the Yellowstone River, Yellowstone National Park.
The Grand Canyon of the Yellowstone River, Yellowstone National Park.
The Mud Volcano Area, Yellowstone National Park, Wyoming.
Boiling mud in the Mud Volcano Area of Yellowstone National Park, Wyoming.
The Mud Volcano Area, Yellowstone National Park, Wyoming.
The Buffalo Bill reservior, near Cody, Wyoming
The Bighorn River in Wyoming, USA
Norris Geyser Basin, Yellowstone National Park.
Minerva Terrace, part of Mammoth Hot Springs, Yellowstone, Wyoming, USA.
Grand Teton National Park , Wyoming
Grand Teton National Park , Wyoming
Grand Teton National Park , Wyoming
Yellowstone National Park: overflow from warm springs showing various colours due to algal activity and differing levels of acidity.
Minerva Terrace, part of Mammoth Hot Springs, Yellowstone, Wyoming, USA.
Grand Canyon of the Yellowstone, Yellowstone National Park, USA.
Yellowstone National Park - Lower falls on the Yellowstone River.
Yellowstone National Park - Lower falls on the Yellowstone River.