Lennox Castle
A hard one to put in a category really as it was first built as a home of the Kincaid Lennox family in order to try to regain the title of the Countess of Lennox but was later put into use as Part of the Lennox Hospital.
Mrs Lennox's nephew decided what was needed to sway getting the title was a home fit for an Earl so he 
asked for the architect David Hamiliton to design him one. It was constructed between 1837 and 1841 and the Lennoxes resided in France. When it was completed so much money had been spent upon it that Mr and Mrs Lennox had to abandon the idea of becoming an Earl.
In 1925 1222 acres of land including the castle were sold off to Glasgow City council to make way for a new hospital for "mental defectives". The new hospital consisted of 20 dormitory blocks, 10 male and 10 female; 60 patients 
in each so total patient numbers were around 1200. There were also kitchens stores, machinery buildings and a main communal hall.
In 1953 maternity patients and staff were moved into the actual castle itself.
The hospital was subject to quite a lot of controversy around the treatment of patients and the general state of the hospital. It was decided in 1993 that closure would begin its slow progress of winding down. Patients were moved out and the hospital finally closed in 2002 and was quickly demolished.
Part of the grounds of the old hospital have been sold to Celtic football club and will
become their new training ground.
The castle still sits on top of the hill now in a very ruinous state as it closed many years before the rest of the hospital, most of the internal floors have gone and access is mostly only possible on the stone staircases at either wing of the building. Some great architectural features remain though and I hope it is not too late to save this fabulous building from becoming even worse.