io9 has a great post on 6 abandoned mental asylums and the stories behind them. Creepy stuff.
There is one story from Topeka State Hospital that is sure to make your skin crawl: According to the Topeka Capital-Journal, a reporter visited the facility at some point during the early 20th century and saw a patient who had been strapped down for so long that his skin had begun to grow over his restraints. Other patients were chained up while naked for months at a time.
And just for fun, here's Jessica Lange singing The Name Game on American Horror Story. Never gets old.