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

Wine bottle sculpture with a ship's stateroom inside.

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

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

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

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

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A memorial to the first person killed by a motor vehicle in the Western Hemisphere.

Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.

This nostalgic blast from the grooming past is also a working barbershop.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Unique antiquarian shop specializing in globes, maps, and prints.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

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

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

A Natural History and Science Emporium.

New York City's only wildlife rehabilitation center treats more than 3,000 feathered and furry patients each year.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.