The notorious headquarters of a corrupt political machine.

Salute the leader of the proletariat.

This iconic tattoo shop has its own onsite museum with artifacts from the early history of modern body art.

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

Commemorating the spot where the famous scientist fed his pigeons.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

An annual extravaganza of Broadway theater memorabilia.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

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

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

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Nikola Tesla's former home contains an homage hidden from plain sight.

The first and only carousel with a lineup entirely of insects.

Unrepaired walls from a 1920 anarchist bomb attack.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

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

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

The former hotel where Tesla invented the radio.

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

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.