The world's longest known cave system.

A local scoured more than 1,000 acres for stone to create his masterpiece.

Marine fossils from the Devonian period are exposed at this park.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

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.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This functioning mill was built in the 1970s using parts from several other West Virginia mills.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

This tiny chapel next to a highway provides weary travelers a place to rest, pray, or maybe even get married.

A nearly century-old amusement park is quietly decaying in a riverside forest in South Carolina.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

The site where Confederate president Jefferson Davis was defeated has been marked with a bust... that leaves that part out.

A life-sized baby elephant tombstone marks the grave of a circus owner at a country church in southern Georgia.

This concrete sculpture features a woman opening her heart to showcase a beautiful fern.

The behemoth beasts engaged in an epic battle is the second-tallest statue in the contiguous United States.

Neglected resting place of some of the city's early luminaries—and a woman encased in concrete.

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.

A monument celebrating the idea of reaching inaccessible places.

The island residents are known for taking their quirky sense of humor with them to the grave.

The highway's southernmost spot is a beloved local attraction.