Hollywood Hospital was a private psychiatric facility located in a former mansion in New Westminster, BC, that operated from 1919 until its closure in 1975. Initially renowned for treating alcoholism with progressive methods—no straitjackets and open‑door policies—it achieved national notoriety in the late 1950s and 1960s when medical director Dr. J. Ross MacLean partnered with LSD advocate Al “Captain Trips” Hubbard to administer more than 6,000 supervised psychedelic therapy sessions using LSD and mescaline, reporting success rates between 50–80% in treating alcoholism, anxiety, depression, and marital issues. The holy‑bush‑lined mansion attracted high‑profile clients like Cary Grant and Andy Williams but faced mounting criticism from mainstream psychiatry and government authorities. After LSD was criminalized in 1968, the hospital lost funding and closed in 1975, leaving behind a legacy as a pioneering yet controversial chapter in pre‑hippie psychedelic therapy in Canada.