This towering volcanic plug stands out among the dramatic formations that dot this otherworldly desert valley.

This sparsely populated town offers a look back in time.

Some of the Old West's most notorious outlaws frequented this mining town.

The final resting place of the living embodiment of the famous Forest Service symbol.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

Home of the International Space Hall of Fame.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

In a largely deserted ghost town, a little brick building recalls its history as a gold rush hub and haven for outlaws.

One of the American Southwest's most extensive collections of Navajo rock art.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

This is one really big nut.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

A multi-storied adobe complex has been inhabited for more than a thousand years.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

Named for a prominent scout and explorer, this Wyoming state park encompasses a replica of an 1840s trading post, a 19th-century Army outpost, and early 20th-century automobile lodgings.

Evanston's historic railroad complex saved this rail town from reaching the "end of the line."

This sandstone building is a relic of the Overland Trail.

One of the smallest towns in the United States.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

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

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