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

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

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 original vault that held the president's remains still stands, empty, not far from where he was finally buried.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

This lagomorph-obsessed Route 66 emporium is home to a giant jackrabbit that sits in a bunny graveyard.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Oversized statues are just the tip of this nostalgic Americana roadside attraction.

Topeka has its own great wall, and it's covered in colorful images from the city's history.

A rainbow-colored house promotes LGBTQ rights across the street from the Westboro Baptist Church.

See the motorcycles that launched the stuntman to fame and the gear that saved his life.

A wonderful collection of all things Oz is nestled in the heart of Kansas.

This historic church is named for abolitionist Henry Ward Beecher and the ruse to arm his fellow abolitionists.

A cannon designed to fire an atomic warhead.

A unique blue and yellow phone booth in America's "Little Sweden."

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

Possibly the world's only drive-in movie theater with an attached motel.

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

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.