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

A terrific purveyor of natural history objects and curios.

The former sign of this immortal music venue is just that--undying.

Phil Mortillaro uses keys to bring art back to the Village.

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

A well-worn marker in a forgotten alleyway is all that remains of what had been one of Manhattan's most beautiful buildings.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

This 19th century brick building in Brooklyn stands out like the anachronistic landmark that it is.

The first statue of Christ sleeping on a bench in the United States confused its affluent parish.

A winding district gerrymandered into the shape of a mantis.

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

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

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

A reminder to choose water over wine since 1888.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

Salute the leader of the proletariat.

A mass grave for victims of one of the city’s worst fires.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.

The site of the deadly Triangle Shirtwaist Factory Fire.

A dilapidated dock tells the story of Titanic's missed arrival.