Commemorating the spot where the famous scientist fed his pigeons.

Volunteer-run library dedicated to exploring five decades of activism history.

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

A whimsical, but often overlooked clock in Park Avenue.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

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

Unrepaired walls from a 1920 anarchist bomb attack.

The former hotel where Tesla invented the radio.

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

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

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

A bit of retro transportation flair preserved in the world's largest department store.

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

An artist's cute bronze subway sculptures belie his violent artistic past.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

Nondescript elevator doors open to reveal a stunning, surreal world.

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

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

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

A hidden "place of interment for gentlemen."

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

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.