Yellowstone: Blowing Off Steam

Storm over the Grand Tetons
Grand Teton Natinoal Park - Wyoming, United States

Yellowstone Lake - Yellowstone National Park, Wyoming, U.S.

Mammoth Hot Springs - Yellowstone National Park, Wyoming, U.S.

Prismatic pool near Fairy Falls - Yellowstone National Park, Wyoming, U.S.

Geysers at Yellowstone National Park, Wyoming, U.S.

Mammoth Hot Springs, the town of Mammoth, and the mountains of Montana
Yellowstone National Park - Wyoming and Montana, U.S.

Yellowstone: Danger Thermal Area

Thermal area near West Thumb on Yellowstone Lake
Yellowstone National Park - Wyoming, United States

Yellowstone National Park - Wyoming, U.S.

Roaring Mountain, Yellowstone National Park - Wyoming, U.S.

Yellowstone National Park - Montana, U.S.

Storming over the Grand Tetons Range - Wyoming, U.S.

To give you an idea of just how dark and impressive the storm was,
this is the same shot as the previous but taken in color