One man's swirling six-acre monument of stone.

Unrepaired walls from a 1920 anarchist bomb attack.

This small, hidden cove is home to abandoned boats.

A Jewish deli run by Yemeni Muslims in an Afro-Caribbean neighborhood is quintessential Brooklyn.

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

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Slyly buy a shake in the Parker Meridien lobby.

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

The first and only carousel with a lineup entirely of insects.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

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

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

Elevated freight railway turned wildly successful urban park.

This small, ingenious cannon once helped regulate Parisian life.

This facility has manufactured stunning tapestries for France's royalty ever since the 17th century.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.