A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

Test your business savvy and play the market for cocktails at this stock exchange-inspired watering hole.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

Down a stairway in the East Village, you could once read a plaque describing an alternate history of a fictional version of Manhattan.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

Hiroshima survivor on Riverside Drive.

A prohibition era watering hole for the police.

This was one of the first (and last) university-built and operated nuclear reactors.

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

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

One kilometer of thick brass rod laid out before your eyes.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

The most confusing clock in New York.

Salute the leader of the proletariat.

The notorious headquarters of a corrupt political machine.

Phil Mortillaro uses keys to bring art back to the Village.

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

Rummage through this sunken ship, but leave your scuba gear at home.

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

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

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

The former hotel where Tesla invented the radio.

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

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