This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

See massive fossils that are over 200 million years old in northeastern Arizona.

The oldest continuously occupied public building in the United States.

A frozen oasis lies beneath the scorching New Mexico desert.

In 1967, murder and mayhem disrupted the tranquility along this quiet stretch of Old Route 66.

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

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

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

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

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

A clear blue swimming hole with hidden caves, still unexplored.

In Edwin Hubble's hometown, a scale model of the groundbreaking telescope that was named in his honor.

When he found his hometown was no more, Lowell Davis decided to recreate a "new" ghost town from scratch.

An adorably sweet display of sculpted Precious Moments figurines.

The world's second largest rocking chair is found on Route 66 in Cuba... Missouri.

This historic motel standing at the "crossroads of America" offers a radio in every room and was saved by local protesters.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

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

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."