Essex County Hospital Center (Overbrook)

Overbrook Asylum, Cedar Grove. 24 patients froze to death in 20 days in 1917. 10,000 patients died here before it closed in 2007.

Twenty-four patients froze to death in their beds over twenty days in December 1917. The boilers had failed at the Essex County Asylum for the Insane in Cedar Grove, and temperatures inside the wards dropped low enough to cause thirty-two frostbite cases in three weeks. The director started writing letters to families begging them to take their relatives home. It was the hospital's worst month, and it set the tone for everything the building would become famous for.

Locals call it Overbrook. Essex County opened the asylum in 1896 on 325 remote, high-altitude acres because that's what people thought mental patients needed. It grew into a sprawling complex of Kirkbride-era wards housing thousands of patients at its postwar peak. After World War II, as many as 150 patients went missing from the grounds at various points, simply walking off into the surrounding woods. Over the asylum's 111-year run, roughly 10,000 patients died inside its walls.

The hospital closed in 2007. For the next eleven years it was the most explored ruin in New Jersey, a crumbling playground for urban explorers, ghost hunters, and Halloween thrill-seekers. Travel Channel's Ghost Adventures filmed a 2008 episode in the abandoned wards and came away with dark outlines flickering past doorways, floating orbs, and an EVP of a voice saying "help me" in one of the empty corridors. A commenter named Y.A. Duck on Weird NJ described a tunnel encounter with a patient called Frank that he couldn't explain.

The reports fell into a small catalog: footsteps in wards that had no floors anymore, voices calling from rooms with no ceilings, and the sense of being watched from windows that stared out over the woods. Verona Historical Society president Gerald Caprio, who volunteered at Overbrook from 1983 to 1985 and taught patients there in 1986 and 1987, knew the building during its operational years. Charlotte Springer, a neighbor, once found an escaped patient wandering through her yard.

The main buildings came down in 2018. Essex County converted the 90-acre site into a park. The demolition didn't stop the reports, though. People walking the trails describe the air dropping sharply colder right where the old wards used to stand, voices in the underbrush, and the unshakable feeling that Overbrook is still there, under the grass. After 10,000 deaths in one complex, that's probably not crazy.