Taunton State Hospital built in 1854 in Taunton, Mass. Built according to the Kirkbride plan of mental asylums. The breezeways were added in the 1890's to connect the neo-classical buildings. After abandonment, most of the buildings burned down. The rest were demolished in 2009.
Pilgrim State Hospital - "originally designed to house 12,500 patients on 1900 acres of land" - constructed from 1930-1941 in Brentwood, New York, USA. " . . . holds the record of being the largest psychiatric hospital in the world" when population peaked at 16,000.