The only remaining Jewish congregation in Greenpoint.

The return of something once considered a basic part of life.

Historic Greenpoint theater, turned roller disco, now housing a chain pharmacy store.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

The only surviving sidewalk clock in Brooklyn.

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

Harlem park dedicated to compulsive hoarders killed by their own junk.

Depression-era fun lives on in this Harlem museum dedicated to the sport of the street.

The studio of influential composer Charles Ives is perfectly reconstructed, hidden in the back of the American Academy of Arts and Letters.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

A whimsical monument deep in this park commemorates the groups that helped build it.

Snack on a partially gestated duck egg.

Piano-making empire filled with 200-year-old steam machines still churning out 1,000 instruments a year.

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

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

One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

There are owls with glowing eyes in Herald Square.

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

Ornate "Renaissance Revival" style building.

Neoclassical bank designed by NY architects Helmle & Huberty.

This semi-hidden Manhattan restaurant is based out of a loading dock.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

Built as a home for the Union Porcelain magnate in 1867, now the Greenpoint Reformed Church and home to a ceramic mystery.

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