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

A sculptural commentary on capitalism pokes up from the East River.

Historical figures from New York City's Catholic community reside in Midtown.

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

A uniquely lettered street sign marks the corner where the iconic word game was invented.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

The mummified relics of an American missionary.

A curious friendship between two inanimate ladies.

Commemorating the spot where the famous scientist fed his pigeons.

A Manhattan Episcopal church with an eerie underground crypt.

A staggering collection of photographs depicting medical, social, and historical change.

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

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

Hear the tales of New York's most notorious criminals.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

The oldest surviving synagogue in New York City is now a soaring art space.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

A legendary speakeasy bookstore returns from the brink.

A dilapidated dock tells the story of Titanic's missed arrival.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.