Dr Barnes' $25 billion private collection of art and arboretum.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

A field of nothing but boulders which resembles a giant's gravel driveway.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This scout retreat, still in use today, was the filming location for the original “Friday the 13th” film.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

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

This might just be the TARDIS of bookstores.

Birthplace of America's first documented serial killer.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

A wunderkammer hidden on the top floor of the Hartford statehouse.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

The "possessed" house that inspired "The Haunting in Connecticut" book and movie.

A reliquary of pop culture marvels, including the world's largest (and most terrifying) Jack-in-the-Box.

"A hideous albatross in the Hudson River Valley."

Collapsing castle on the Hudson river was once the storage site of military surplus business.

This mouldering abandoned mental hospital was once a center for progressive healing.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

137 graves holding New England's earliest residents.

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

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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

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