If you live on Long Island, eventually you will pass the Pilgrim State Hospital site and wonder what the heck this huge building is. There’s really no escaping it. Opened October 1, 1931 (we just missed its 80th Anniversary), it was at one time listed in the Guinness Book of records as the largest mental institution in the world. At its highest capacity, just after World War II, Pilgrim State housed over fourteen thousand patients. The massive property had its own Long Island Railroad station, post office (with its own postmark), power plant, agriculture and livestock farms, cemetery, police and fire stations and water tower. The complex was made up of many different buildings on over a thousand acres.