The only diamond mine in the world where you can keep what you find.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

A mysterious castle built as a monument to lost love.

The second oldest continuously operating bar in Louisiana.

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

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

This underground oasis is one of North America’s most fascinating prehistoric places—and you can scuba dive in it.

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A modernist landscape of water and sci-fi concrete.

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

Two thousand artifacts from around the world collected by one woman who loved to travel.

Where beautiful signs live on forever.

A lush green oasis in the middle of Chicago.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A museum and shop on Bourbon Street located in the French Quarter.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.