Yellowstone National Park is located primarily in Wyoming, but extends into parts of Montana and Idaho. Established as a National Park on March 1, 1872, it was the first national park in the world. It is known for its large variety of wildlife and…

Yellowstone National Park is located primarily in Wyoming, but extends into parts of Montana and Idaho. Established as a National Park on March 1, 1872, it was the first national park in the world. It is known for its large variety of wildlife and…

Small geyser cone at Yellowstone National Park, Wyoming.

Shoshone Dam near the entrance to Yellowstone Park, Wyoming.

Shoshone Dam near the entrance to Yellowstone Park, Wyoming.

Power house below Shoshone Dam, Wyoming.

Black and white lantern slide of Audie Merrill posing on a hillside next to a fenced-in petrified tree. Two other people, Sinclair and Virginia, are visible through the fence.

Black and white lantern slide close-up view of petrified trees in the grass with measuring sticks.

Mammoth Hot Springs at Yellowstone National Park, Wyoming.

Lower Falls of the Yellowstone River, Wyoming.

Black and white lantern slide of Obsidian Cliff, Wyoming.

Black and white lantern slide of old lava formations on Amethyst Mountain in Wyoming.