Folksinger Woodie Guthrie was a patient at Greystone Park State Hospital from 1956 – 1961. The psychiatric hospital housed as many as 7674 patients in a facility designed for 600.
Greystone is where the TV show “House” with Hugh Laurie was set at the end of Season 5, beginning of Season 6. The fictional Mayfield Psychiatric Hospital is Greystone Park State Hospital.
Below the building, a series of tunnels and rails connect the many sections.
http://www.savegreystone.org/famous_greystone.asp