This Great Depression-era creation was once known as the strangest house in the world.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

Destructive children, start your engines.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

A completely round house designed for the Atomic Age.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

Where America's first doomsday cult awaited the end of the world.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

A rare view of a preserved Victorian science museum.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

A layered tribute to the work of mosaicist Isaiah Zagar.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

America's first serial killer rests in anonymity.

Pennsylvanian mass grave and possibly mass murder.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.