St. Thomas Psychiatric Hospital — Ontario's haunted asylum ruins

The former St. Thomas Psychiatric Hospital in St. Thomas, Ontario, was a sprawling psychiatric facility that operated from 1939 to 2013. The hospital, built in a distinctive Art Deco style, treated patients with a range of mental illnesses and was one of the largest psychiatric facilities in Ontario. Like many such institutions, the hospital's history includes overcrowding, questionable treatment methods, and patient deaths. The facility was featured on the Canadian show Knock Knock Ghost, which documented reports of poltergeist-like activity in the abandoned wards. Staff who worked at the hospital before its closure described hearing patients calling out from rooms that had been empty for years, seeing shadow figures moving through corridors, and experiencing equipment malfunctions that seemed to follow them through the building. Since the hospital's closure, urban explorers who have entered the deteriorating buildings report intense encounters — the sound of screaming from sealed wards, the sensation of being followed through the tunnels connecting the buildings, and doors slamming shut behind them. The hospital's substantial footprint in the small city of St. Thomas, combined with the community's awareness of its troubled history, has made it one of southwestern Ontario's most talked-about haunted locations.