A mass grave for victims of one of the city’s worst fires.

Final resting place of the immigrant who brought artificial seltzer water to America.

Spike Lee's provocative film is officially honored right where it was made, the first time a work of art was used as a secondary street name.

Oldest surviving example of a Dutch saltbox frame house in America.

A heartbreaking monument showing the last morning in the life of Jane Griffith.

Constructed in the 1920s, this former pencil factory is now an office building.

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

One of only two remaining Victorian-era greenhouses in New York.

A modern zoetrope on the New York City subway.

A curious friendship between two inanimate ladies.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

Sniff the Titan Arum's rotting flesh.

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.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

This geodesic gallery holds a collection of painted spheres that make traditional canvases look lazy by comparison.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

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

A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

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

The narrowest house in America is seven feet of pure spite.