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

The only freestanding table rock formation east of the Mississippi.

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

Lions and tigers and leopards, servals, pumas, bobcats, lynxes, and ocelots... oh my!

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

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

This massive railroad spike celebrates the 1939 premiere of the movie “Union Pacific.”

An obelisk commemorating Lincoln's role in connecting the coasts.

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

Home with Gothic windows featured in a famous painting.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

This seemingly charming home memorializes and honors the victims of a century-old unsolved murder.

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

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

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

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

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

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.

Unique tower has outlasted a takeover of the company.

This huge clock made of flowers and simple machinery was once used a political weapon.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.