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

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

Pittsburgh's literal underground railroad.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

A memorial for an outsider theorist who believed that the planet is actually hollow.

It may appear to be a fancy junk yard, but each item has a story to tell and a lesson to impart.

Once home to a booming 19th-century oil town, the park now houses a World War II submarine memorial complete with a torpedo.

The farming museum contains an extensive taxidermy collection, including the world's largest stuffed horse.

A memorial honoring those who perished in one of the worst construction disasters in U.S. history.

This tiny museum kept in a B&B laundry room holds the death mask of notorious bank robber Pretty Boy Floyd.

Housing the history of a small Ohio town that is known to some as the pottery capital of the United States.

This quaint stretch of road is the final resting place for hundreds of America's four-legged veterans.

Memorials and tributes scattered across the university grounds remember a famous national tragedy of the Nixon era.

A singular collection of hand-built art deco cars are held in a building with style to match.

This historic Ohio bridge is adorned with fanciful locks left behind by loving couples.

Dozens of striking Indian symbols cover the second-floor hallways of this rural courthouse.

At the center of this cemetery stands a 2,000-year-old burial mound of the Adena culture.

An old church full of restored Catholic statues is a makeup artist's labor of love.

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

An abandoned relic of the city's failed experiment with below ground transit.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

The 25th President's marble casket can be visited in this classical Ohio tomb.

A lost cemetery stands forgotten on a hilltop, known only to the older residents of Pomeroy.

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.