Severalls Mental Hospital

Shot over two separate visits.
Built in 1910, the 300-acre (1.2 km2) site housed some 2000 patients. It was based on the "Echelon plan", a specific arrangement of wards, offices and services within easy reach of each other by a network of interconnecting corridors.
Psychiatrists were free to experiment with new treatments on patients seemingly at will, using practices now considered unsuitable, such as electro-convulsive therapy (ECT) and the use of frontal lobotomy .
The hospital closed in the early 1990s.    Source Wikipedia