These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

Twenty-eight years after this local landmark was washed ashore by hurricane Hugo, it was washed away by hurricane Irma.

One of the oldest living oak trees in the Southeast.

The world's longest known cave system.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

A castle built by an eccentric medieval enthusiast in rural Ohio.

Rabbit Hash is a heaping slice of Americana from another era, with a very peculiar origin behind its unusual name.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

You thought Santa Claus didn't exist, but it turns out you were wrong.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

A wartime promise becomes a shrine to Our Lady of Lourdes.

Indiana's shrine to the sport that has become a hallmark of their culture.

This mysterious hill seems to pull objects uphill.