Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Hiroshima survivor on Riverside Drive.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

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

What happens here stays here – unless it affects the whole world.

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

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

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

Salute the leader of the proletariat.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

Commemorating the spot where the famous scientist fed his pigeons.

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

A living archive of urban activism and space reclaimed.

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

The oldest living tree in Manhattan comes shrouded in sinister legend.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

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

A hands-on traveling collection of the innovative devices of yesteryear.

A New York garbage depot holds a secret collection of weird and wonderful refuse.