A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

Commemorating the spot where the famous scientist fed his pigeons.

Elevated freight railway turned wildly successful urban park.

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

New York City's smallest piece of private property.

An aptly-named street near the birthplace of the modern LGBT rights movement.

Jimi Hendrix's legendary recording studio in Greenwich Village.

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

Try not to get slimed in Tribeca.

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

A touching tribute to the "Queen of Soul."

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

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

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Unrepaired walls from a 1920 anarchist bomb attack.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

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

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

On the Hudson resides one of the largest clocks in the world.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.