In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

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

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

Walk into the 19th century without leaving Brooklyn.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

Unrepaired walls from a 1920 anarchist bomb attack.

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

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

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

A collection of fanzines, recordings, and documents detailing the rise and influence of the feminist punk movement.

The loneliest island in New York.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

New York City's smallest piece of private property.

The "Seinfeld" diner.

Ride the subways of yesteryear.

A dilapidated dock tells the story of Titanic's missed arrival.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Try not to get slimed in Tribeca.