An annual extravaganza of Broadway theater memorabilia.

The first and only carousel with a lineup entirely of insects.

The site of the deadly Triangle Shirtwaist Factory Fire.

NYC's legendary underground network for bovine transportation.

A partially hidden wall graffitied by spectators of the 1976 Bicentennial, recently rediscovered.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

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

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

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

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

A whimsical, but often overlooked clock in Park Avenue.

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

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

The oldest living tree in Manhattan comes shrouded in sinister legend.

The famous author's cottage hideaway.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

This innocent-looking townhome is actually a subway exit.

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

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

A hidden "place of interment for gentlemen."

A living archive of urban activism and space reclaimed.

Bowl in splendor, if you're lucky.