The Pavilion building, built in 1885, was originally an Asylum for women. It handled the overflow from the Asylum on Roosevelt Island, and typically received chronic cases. In the 1970s, it was last used as a drug rehab facility called Phoenix House. People have reported all kinds of paranormal phenomena here, such as hearing voices and seeing apparitions.
Hart Island, which sits at the western end of New York's Long Island Sound, boasts more than 850,000 residents - all of them dead. The island is now used primarily as a potter's field, but in its past it has housed a POW camp, a rehab facility, and a women's insane asylum.