A Manhattan office building is home to the world's largest chess board.

A veritable variety of odds and ends.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

Test your business savvy and play the market for cocktails at this stock exchange-inspired watering hole.

A staggering collection of photographs depicting medical, social, and historical change.

A notorious punk house turned co-op.

This collection of grinning ephemera has grown from basement to Brooklyn.

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

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

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Unrepaired walls from a 1920 anarchist bomb attack.

Unique antiquarian shop specializing in globes, maps, and prints.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Cryptic messages embedded in the New York City sidewalk.

Reverend Jen's unique museum/living room showcases her troll collection.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

An unassuming secret door once led to a legendary watering hole.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

A legendary speakeasy bookstore returns from the brink.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

From scholastic to sepulchral - now under reconstruction.