The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

A historic lighthouse steeped in rumors of ghost and pirate stories.

A large camera obscura, constructed entirely from digitally fabricated components.

This 19th-century Hamptons windmill was once home to modernist painter Agnes Pelton.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

A mysterious air force base built to resemble a Long Island fishing village.

A tribute to the hard-working men and women of Grumman, who crafted F-14 fighter jets.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

This forgotten graveyard in rural New York State once served a pioneering hospital.

An eccentric playboy's astounding natural history collection.

Whale bones, scrimshaw, and sperm oil make up just a part of this comprehensive collection of whaling history.

The last standing puppet theater on Long Island.

Spies, love letters, and ghost stories have all left their mark on this home-cum-museum.

The former estate of the Guggenheims, part of the opulent Gold Coast that inspired the Great Gatsby.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

The corporeal remains of Napoleon III's dentist rest under this 15-story obelisk.

This sculpture of a fisherman spent six years at the bottom of the Schuylkill River.

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

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.