This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

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

The most confusing clock in New York.

The notorious headquarters of a corrupt political machine.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

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

There must be a pun in this haystack somewhere...

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

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.

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

Unrepaired walls from a 1920 anarchist bomb attack.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

More than 250 sakes are available in an izakaya hidden in the basement of a Midtown office building.

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

Plot your trip through the city on the sidewalk.

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

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

Avoid gangster interaction while window-shopping.

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

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

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.