Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

Unrepaired walls from a 1920 anarchist bomb attack.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

New York City's first Modernist house.

A Manhattan office building is home to the world's largest chess board.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Read a book next to a Midtown waterfall.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

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

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

Recovered suit of a cannibalistic West African gang.

A controversial magical figure is hidden within a diorama of the city.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

This vacant church in the Financial District was once the heart of New York's first Syrian immigrant community.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

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