Join in a Seance at the Swedenborgian Church.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

A castle built for love, and abandoned due to heartbreak.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

The remains of a failed subway in upstate New York is now an underground graffiti bunker.

A hands-on traveling collection of the innovative devices of yesteryear.

Volunteer-run library dedicated to exploring five decades of activism history.

Hear the tales of New York's most notorious criminals.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

Town full of spiritualists, some of whom are mediums, is still in full swing after 130 years.

Unrepaired walls from a 1920 anarchist bomb attack.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

Rummage through this sunken ship, but leave your scuba gear at home.

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

The library of every book lover's dreams.

Why have you never heard of the second most popular tourist site in New York?

Sniff the Titan Arum's rotting flesh.

Once America's longest-manned military fort, now an abandoned hulk.

Relics given to a Manhattan church to avoid seizure by the Italian government.

Hundreds of antique bank vault locks on display in New York City.

New York's oldest and possibly grandest keeper of books.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.