The famous author's cottage hideaway.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

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

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

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

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

An abandoned asylum where patients have been forgotten but their possessions remain.

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

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

The "Seinfeld" diner.

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

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

The loneliest island in New York.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

A hidden "place of interment for gentlemen."

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

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

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

A long abandoned hospital building on the outskirts of NYC.

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

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