The only road through the heart of Glacier National Park.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

A scenic ravine with an astounding collection of rock art created by the Indigenous people of the Great Plains.

Mining town from the late 1890s, once home to Calamity Jane.

An entire town preserved as a historic landmark.

This town is home to the world’s largest arch constructed entirely of elk antlers.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

This rustic old building is said to be the most photographed barn in America.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

The highest point in Montana is as rugged and singular as the state itself.

Native Americans built this circle of stones, which was used to predict astronomical events.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

A devilishly named gorge that was a sign of salvation for many pioneers.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

The first declared National Monument in the United States.

A cemetery housing wild west legends in South Dakota.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.