Yellowstone National Park is a popular destination for geology field trips. It’s easy to see why—the dynamic landscape contains a variety of geological wonders that are not easily seen elsewhere.

Established in 1872, Yellowstone National ... River as a public park. [It] is hereby reserved and withdrawn from settlement, occupancy, or sale under the laws of the United States, and dedicated ...

Yellowstone National Park's nearly 3,500 square miles seep slightly across state borders into Montana and Idaho, but its major attractions are contained in the northwest corner of Wyoming.

The lieutenant was right: Yellowstone is a volcano, and not just any volcano. The oldest, most famous national park in the United States sits squarely atop one of the biggest volcanoes on Earth.

New research shows that dead trees in Yellowstone National Park may pose a greater fire danger than previously suspected.

Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine, devoted entirely to America’s first national park. Find more at natgeo ...

The first national park was created by the United States in 1872, called Yellowstone National Park. The law established during this year allowed for the term to be widely used across the U.S. and ...