The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

The greatest real estate coup of all time.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

Creaky dinosaurs grow in the backroads of Monmouth County, New Jersey.

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

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

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

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

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.

A formerly abandoned mental institute, now back in business.

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

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

The site of a tragic massacre that spawned a multimedia franchise.

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