This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.

The largest earthwork effigy in the world.

Rabbit Hash is a heaping slice of Americana from another era, with a very peculiar origin behind its unusual name.

An abandoned munitions factory with a shot tower continues to wage war on the surrounding environment.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

This magnificent Cincinnati graveyard is also a popular public park.

Mussolini gave Cincinnati a bronze statue of Romulus and Remus suckling at a wolf's teats.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

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

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

The spectacular collection of one of the world's best woodcarvers.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

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

One of just a few cities in the world to base their center of government on an island. Others: Paris and Osaka.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

No one knows the origin of this small town’s unique name.