There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

Gang fights don't just happen on the streets, they happen under them too.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

This humble historic facade hides a history of boozing and the gentlemanly sport of rat-fighting.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

Down a stairway in the East Village, you could once read a plaque describing an alternate history of a fictional version of Manhattan.

An annual extravaganza of Broadway theater memorabilia.

A notorious punk house turned co-op.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

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

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