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

The largest earthwork effigy in the world.

This presidential tomb was not dedicated until years after Harding's death due to personal controversy.

A castle built by an eccentric medieval enthusiast in rural Ohio.

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.

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

This burger joint is named after everyone's favorite carnival prize and is adorned with a giant one over the door.

One of the largest collections of holy relics in the country.

The largest ancient burial mound in Ohio.

A headstone tells the sad story of a lost little boy and his pet dog.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

A real flying saucer, contracted by the U.S. Air Force.

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

This moving cemetery sphere is a slowly rolling stone.