The 28-foot granite map plots the locations of 40 theaters in New York City.

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

The highest point on the island known for buildings that touch the sky.

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

The artist and New York City icon lived, worked and died in this converted carriage house owned by another iconic artist, Andy Warhol.

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

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

An annual extravaganza of Broadway theater memorabilia.

There must be a pun in this haystack somewhere...

The most confusing clock in New York.

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

A posh members-only club with a literally dramatic history.

The notorious headquarters of a corrupt political machine.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

Little Red Lighthouse under the George Washington Bridge.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

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

A whimsical, but often overlooked clock in Park Avenue.

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

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.

Unrepaired walls from a 1920 anarchist bomb attack.

The oldest living tree in Manhattan comes shrouded in sinister legend.

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

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