The Norwich State Hospital, located in Norwich and Preston, was an extensive facility for the mentally ill and those found guilty of crimes by insanity. It opened in 1904 in a single building, but in the following eight years 13 new structures were added. The Hospital had over 3,000 patients by 1955 and was a huge complex of over twenty buildings linked by underground tunnels. In later years deinstitutionalization led to a large decrease in the patient population and the Hospital closed in 1996. It then became an infamous abandoned site, said to be haunted. The complex was frequently visited by urban explorers. Syfy Channel’s Ghost Hunters visted the site in 2010, but since then the majority of the buildings have been demolished in preparation for future redevelopment. Once at the center of the Hospital, the Administration Building, built in 1908, now stands alone, weatherized to prevent further decay and awaiting future development.