World's first "penitentiary," meant to be humane, drove men insane.

A park full of outsider art, created by college students studying outsider art.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

Arlington Cemetery exhibit dedicated to death and grieving.

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

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

This might just be the TARDIS of bookstores.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

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

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 only thing better than tubing down New Jersey's scenic Delaware River is doing so while eating a hot dog from a giant floating stand.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

The residents of this ominous-sounding street in Pennsylvania liked its name so much they fought to keep it.

The abandoned coal loading dock is a canvas for unsanctioned art.

Descendants of this colonial Pennsylvania family still travel from far and wide to visit the 300-year-old home of their Quaker ancestors.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

The graffitied ruins stand hidden within the Pennsylvania woods.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.