This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

A curious friendship between two inanimate ladies.

“Invented in Key West, Perfected in Brooklyn."

Sniff the Titan Arum's rotting flesh.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

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

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

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

One of the last Jazz Age "Wonder Theaters" in New York City.

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

Lie in a hammock where George Washington stood.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

The "Seinfeld" diner.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

A hidden "place of interment for gentlemen."

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Walk over a 150 year old manhole.