Walking around West Harlem reveals a scavenger hunt of beautiful bird murals.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

One of the only single-person private gravesites in New York City.

Hiroshima survivor on Riverside Drive.

Salute the leader of the proletariat.

Reverend Jen's unique museum/living room showcases her troll collection.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

This block in downtown Brooklyn was a hotbed of antislavery activism along the Underground Railroad.

The Underground Railroad passed right through this historic Brooklyn Heights church.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

Unrepaired walls from a 1920 anarchist bomb attack.

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.

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

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

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

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

This slender three-story building has also had several famous residents.

Hidden behind a gate in Greenwich Village is a little farmhouse that once served as the writing studio of a bestselling author.

The notorious headquarters of a corrupt political machine.