Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

This is one really big nut.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The “American Gothic" artist's largest works hang in an Iowa State University library.

Lured here by the promise of tens of thousands in gold, Jesse James started a quintessentially American trend of robbing trains in-motion.

The notorious couple camped at this site after a bloody shootout with police.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

A single artist is behind these large-scale models made of hundreds of thousands of two-inch wooden matchsticks.

An idle pastime becomes a record holder in Boys Town, Nebraska.

An annual festival celebrating Colorado's most famous frozen corpse.

When ecosystems collide in the arid Southwest.

Once a dining hall for boarding school students, this lodge was a popular haunt for nuclear physicists working on the Manhattan Project.

The oldest continuously occupied public building in the United States.

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

"I did this all while you were watching TV."

The fictional star of "Breaking Bad" is memorialized with a real-life gravestone in his hometown.

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

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

At this research institute, the chile is king.

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

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