The U.S. government built the million-pound stack of steel during the Space Race.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

A diorama of the Civil War, fought by cats.

Originally a cemetery, this city park remains speckled with a handful of scattered gravestones.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

Hear, smell, see, taste, and touch history at this immersive Civil War hospital.

This abandoned Victorian-style house was built in 1884.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

A decaying garage hidden amid the dense forest is all that remains of a once-prosperous dairy farm.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

A Civil War Museum with some notable medical antiques.

Exact replica of the ancient monument, but much, much lighter.

Two insane asylum bodies embalmed by an amateur.

Two gems of Beaux Arts architecture that have been sitting vacant for years.

The largest cemetery for enslaved people in Loudoun County was almost lost to history, if not for the research of a minister.

This historic furnace was once used to produce cannonballs during the Civil War.

A well-preserved relic of the industrial age steel and iron works that dotted West Virginia.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

This museum sits on the site of a decommissioned military communications base.

In the parking lot of a fast food restaurant, a statue memorializing a prolific bull elephant.

Bizarre Cavern.