This small memorial is almost as well concealed as Smalls himself was on the night he sailed to freedom.

Mysterious library of an infamous financier and spiritual seeker.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

The "Seinfeld" diner.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

Slyly buy a shake in the Parker Meridien lobby.

A celebration of capitalism in Midtown.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

The oldest Methodist church in the United States has been spreading the good news for over two centuries.

Unrepaired walls from a 1920 anarchist bomb attack.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Under a glass sidewalk lie the remains of some of Manhattan's oldest 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.

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

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.