Little Red Lighthouse under the George Washington Bridge.

This Russian bar-restaurant lies within a three-story underground bathhouse.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

The loneliest island in New York.

During the holidays, a vintage subway train whisks New Yorkers back in time.

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

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

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

An extensive collection of fine art devoted to man's best friend.

This speakeasy continues the Prohibition-era legacy of Harlem's jazzy Swing Street.

Relics given to a Manhattan church to avoid seizure by the Italian government.

Come for the pastrami, stay for the million-dollar art.

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

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

Prove you deserve to be fed by Kenny Shopsin.

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

From scholastic to sepulchral - now under reconstruction.

“Invented in Key West, Perfected in Brooklyn."

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

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Rome's first modern graffito is all that is left of a peaceful protest from the 1970s.