SC, Fort Mill, Heritage USA - an American Christian theme park, water park, and residential complex - PTL Club (short for "Praise The Lord") founders televangelist Jim and Tammy Faye Bakker. This 500 room hotel was never completed and now sits abandoned.
Beelitz Heilstätten Sanatorium, originally a tuberculosis sanatorium, but converted into a military hospital during World War I by the German Imperial Army. Adolf Hitler was treated in this hospital in October Cool place, but not about hitler though.
The Los Feliz Murder Mansion in Los Angeles has been abandoned for more than 50 years. On December Dr. Harold Perelson bludgeoned his wife to death and attacked their daughter with a hammer. He then committed suicide by drinking acid.