An abandoned dollhouse factory.

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

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

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

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

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

The notorious headquarters of a corrupt political machine.

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

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

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

You don't have to be an ambassador to dine like one.

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.

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

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

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

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

One of New Jersey's oldest churches is a historical treasure trove.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

D.C. once had its own tiny rival to the New York Stock Exchange.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

This giant spider sculpture made from the iconic car is one giant visual pun.