This slender three-story building has also had several famous residents.

Love is in the air along the small street in Brooklyn.

The longest step street in the city.

Amid skyscrapers and traffic exists this unique aquatic ecosystem.

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

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

There are owls with glowing eyes in Herald Square.

New York's oldest magic store.

A terrific purveyor of natural history objects and curios.

A Hell's Kitchen synagogue that has counted stars of stage and screen among its congregation.

This sculptural piece by the artist Tom Otterness doubles as a jungle gym.

Sip a cappuccino in the historic cafe that introduced them to the United States.

In 1986, Keith Haring was arrested for painting this anti-drug mural on a Harlem handball court.

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

Dine on dumplings at the oldest dim sum restaurant in New York.

Established in 1937, the oldest candy shop in New York City boasts a rainbow-colored inventory that would make Willy Wonka envious.

Nope, not Washington Irving's house.

This outdoor gallery of sculptures along the East River was once a landfill.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

The only remaining building in New York to see the inauguration of a president is being slowly overtaken by a grocery store.

This Upper East Side apartment co-op was designed as a tuberculosis sanitarium.

New York's southernmost subway station is whimsically wavy.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

A cargo of beautiful music.