A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

A hidden "place of interment for gentlemen."

Collapsing castle on the Hudson river was once the storage site of military surplus business.

One man's lifelong obsession with death.

The phone booths of New York City have all but disappeared, but their remains were once found in this "graveyard," sadly now removed as well.

The creek where a shark wreaked terror upon New Jersey, and served as the inspiration for "Jaws."

The remains of a 19th century spring, and the site of an infamous unsolved murder.

Series of storm drains connected to a dark urban legend.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.