The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

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

A rapidly disappearing glacier filled with extinct grasshoppers, perfectly preserved in the ice.

A creek tumbles over a series of step-like rocks to create this scenic water feature.

Home to a timed geyser created by complete accident.

A museum dedicated to the history and art of staying clean.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.

Despite his legacy of work in Spain, Cuba, and Florida, the larger-than-life writer's grave is a simple affair tucked in an Idaho cemetery.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

When in Idaho, sleep in a giant potato.

New Plymouth, Idaho is the only U-shaped town in the United States.

This highest peak in Idaho can only be reached by traversing a formation known as "Chicken-Out Ridge."

Home to the deepest rift anywhere on Earth.

The mayor made the declaration in 2004.

After this former brothel closed, its interior remained almost frozen in time.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

A black cottonwood gets a second life as a home for books.

A wild west land agreement was etched right onto this historic Idaho stone.

Natural rock water slides hidden in the remote forests of northern Idaho.

A 1960s damming project turned one family’s hilltop cemetery into an island.

The South Carolina competition challenges you to trap as much grits on your body as possible.

The oldest liquor store in the country is a model of resilience and mischief.