This huge dam across the Colorado River caused an armed standoff between two U.S. states.

A geological mystery on Camelback Mountain.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

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

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

A self-built castle made by a mysterious man.

A sharp bend in a dramatic river canyon cut through red rocks.

Most-visited and most-photographed slot canyon in the American Southwest.

Delve into the life of Edna St. Vincent Millay, harbor town history, and a quiet seaside garden at this charming library.

The longest and widest floating bridge in the world.

Romance fans worldwide make the pilgrimage to this group of historic covered bridges in rural Iowa.

The last location where Buddy Holly, Ritchie Valens, and J. P. "The Big Bopper" Richardson played before their tragic deaths.

This simple home was the beginning of a long journey for the iconic Western film star.

Eight feet in diameter and more than 24 feet around.

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

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

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.