Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

A daily replay of the experiment that proved the rotation of the Earth.

A small town garden is dedicated to a psychic dog with the most soulful eyes.

Curious cave that stays a cool 56 degrees all year long.

Like Stonehenge, but with boats and oodles more charm.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

Locals place their offerings on this nightmarish gnarled tree so the witches won't summon another storm.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

You thought Santa Claus didn't exist, but it turns out you were wrong.

Bizarre and inspired combination store selling only two items: tires and bibles.

This tiny man looms large over downtown Charleston.

The failure of one component toppled this entire bridge during rush hour.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

A small Richmond island dotted with the remnants of hundreds of years of history.

This beautiful vintage movie palace has seen little change in form or function since the 1920s.

A much-maligned monument to teetotalism.

An overgrown garden stands as a grim marker of an unrealized dream.

An Industrial Revolution-era public work that purified water using nothing but sand.