The evolution of recreational vehicles and motorhomes is on display in the “RV capital of the world."

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

The first spinning jail built in the United States is the only one that still turns.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

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

Away from the crowds of fishing enthusiasts, take a hike deep into the woods and journey into an eerie darkness.

Often referred to as the largest spring in America.

One of the deepest springs in Missouri.

A gem in the small Missouri town where Winston Churchill coined the term "Iron Curtain" and effectively began the Cold War.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

An adorably sweet display of sculpted Precious Moments figurines.

The crumbling remains of the first Black-owned and operated hospital in Kansas City.

One man's unrequited love stands in a glass box forever.

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

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

Where the author wrote her beloved "Little House" books.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

An abandoned concrete jungle surrounded by a lush park.

A remarkably opulent mansion with a tragic history.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

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

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

Curious cave that stays a cool 56 degrees all year long.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.