A graffiti Mecca welcoming artists from around the world.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

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

Commemorating the spot where the famous scientist fed his pigeons.

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

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

A semi-scholarly approach to sex.

A modern zoetrope on the New York City subway.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

Lie in a hammock where George Washington stood.

An artist's cute bronze subway sculptures belie his violent artistic past.

Elevated freight railway turned wildly successful urban park.

The most confusing clock in New York.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Salute the leader of the proletariat.

Walk into the 19th century without leaving Brooklyn.

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

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.