Final resting place of Typhoid Mary.

This forgotten graveyard in rural New York State once served a pioneering hospital.

A historic recreation of the golden age of the Erie Canal, abandoned for some time, slowly being restored.

A way to take your secrets to someone else's grave.

An 1883 schoolhouse now home to collective of artists.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Final resting place for the Triangle Shirtwaist fire’s unidentified victims.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

Brooklyn's Barkaloo Cemetery is the resting place of a scant two bodies.

All that remains of a magnate's dream home is a historic gate and an abandoned public pool.

An abandoned dollhouse factory.

This lovely little pond is named after the hundreds of soldiers' corpses that were rolled into the waters during the French-Indian War.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

"Call for the doctor, call for the nurse... Vote!! said the lady with the alligator purse."

A burial ground of rusting metal grave markers.

The first pet cemetery in the United States.

Some of the earliest burial grounds of New York State are to be found hidden away in this quaint town.

Failed state-supported institution meant to rehabilitate students with intellectual disabilities.

One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

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

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.