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

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

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

Home to the deepest rift anywhere on Earth.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

This oddity shop contains everything from antique tools to a human skeleton.

The largest outdoor art gallery in the Northwest United States.

Birdhouses, peacocks, animal sculptures, and a graveyard are all found along this eclectic nature trail.

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

Rare and gorgeous birds abound in this protected wildlife sanctuary.

This Wyoming town is fascinated by a particular mythical creature.

Population: 1.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

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

One of the smallest towns in the United States.

An architect's childhood fantasy treehouse made real.

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

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

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

One man's ambition created this psychedelic log home.

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.

The first declared National Monument in the United States.