A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

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.

The most confusing clock in New York.

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

A bit of retro transportation flair preserved in the world's largest department store.

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

Commemorating the spot where the famous scientist fed his pigeons.

Rummage through this sunken ship, but leave your scuba gear at home.

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

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

The oldest surviving synagogue in New York City is now a soaring art space.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

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

A semi-scholarly approach to sex.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.