Collapsing castle on the Hudson river was once the storage site of military surplus business.

Rummage through this sunken ship, but leave your scuba gear at home.

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.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

Mysterious 500-year-old tapestries depict a unicorn hunt.

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

The only rotating bar in New Orleans has been slowly spinning since 1949.

What happens here stays here – unless it affects the whole world.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

In the back of a nondescript sports bar is a museum-worthy mural by legendary cartoonists.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

The tiniest little stage in New York.

A prohibition era watering hole for the police.

The greatest real estate coup of all time.

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

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

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

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

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

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

This semi-hidden Manhattan restaurant is based out of a loading dock.

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

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.