A historic Black graveyard hidden in the parking lot of one of America's largest malls.

Haunted Victorian house that inspired a legendary "Ghostbusters" court ruling.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

The site of a tragic massacre that spawned a multimedia franchise.

The lost town of Neversink, sunk by New York City.

This Central New York ghost town was once a prosperous railroad community.

This house was the subject of an Edward Hopper painting, which in turn helped inspire the design of the Bates house in Alfred Hitchcock's 'Psycho.'

A century ago, aspiring socialites climbed on this cement beast with the hopes of marrying a millionaire.

The final resting place of New England's last "vampire."

A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

The mummified relics of an American missionary.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

A celebration of capitalism in Midtown.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Unrepaired walls from a 1920 anarchist bomb attack.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

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

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

Try not to get slimed in Tribeca.

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

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

The first pet cemetery in the United States.