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

Guerilla gardeners reclaimed this abandoned railroad land literally putting down roots.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

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

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

An institution dedicated to the towering buildings that make up skylines in New York City and around the world.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

New York City's smallest piece of private property.

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

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

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Currently housing a corporate bank branch this building at the southern tip of Manhattan was once the gateway to luxury vacationing.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

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

Storage warehouse of the rich and famous.

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

Plot your trip through the city on the sidewalk.

Built just after the American Revolution, the oldest row house in New York City still stands in Chinatown.

Avoid gangster interaction while window-shopping.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

Church in Manhattan holds the bloody sock of Padre Pio, among with many other unusual relics.