The site of the deadly Triangle Shirtwaist Factory Fire.

Once America's longest-manned military fort, now an abandoned hulk.

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

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.

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

This innocent-looking townhome is actually a subway exit.

Sniff the Titan Arum's rotting flesh.

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

Detailed facade of a brownstone in Boerum Hill.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

A bit of retro transportation flair preserved in the world's largest department store.

Avoid gangster interaction while window-shopping.

Visit the monolithic tomb of America's most famous general.

An artist's cute bronze subway sculptures belie his violent artistic past.

One man's swirling six-acre monument of stone.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Lie in a hammock where George Washington stood.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

Abandoned power station once home to a squatter community, now being developed into an arts center.

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

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

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

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.