Harlem park dedicated to compulsive hoarders killed by their own junk.

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

There must be a pun in this haystack somewhere...

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Hiroshima survivor on Riverside Drive.

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

This former crime corner has been turned into an eclectic community center.

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

The most confusing clock in New York.

One kilometer of thick brass rod laid out before your eyes.

The mummified relics of an American missionary.

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

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

Salute the leader of the proletariat.

Haven for steampunks.

The notorious headquarters of a corrupt political machine.

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

A posh members-only club with a literally dramatic history.

A Manhattan Episcopal church with an eerie underground crypt.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

Join in a Seance at the Swedenborgian Church.

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

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

The first "Hall of Fame" in America was designed by legendary Gilded Age architect Stanford White for what was then the NYU uptown campus.