The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

There’s a hidden military meme engraved on the World War II Memorial.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

An overlooked memorial honoring the local Washington residents who died in World War I.

This supermarket is suspended 25 feet above an interstate highway.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

One of the indelible moments of the American Revolution took place at this location.

Overgrown ruins of a turn of the century island fort that sees very few visitors.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Ice cream stand, snack bar, and time capsule of milk conveyance.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

Memorializing an American tragedy of massive proportions.

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

This dramatic rail curve was once the target of a failed Nazi attack.

Steepest flood safety railway in the entire world.

A peaceful international sculpture garden in upstate New York.

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.