Beelitz-Heilstätten Hospital, Germany
If this old German hospital looks disturbing, well, it is.
Just check out its chilling resume: Between 1898 and 1930, the Beelitz-Heilstätten complex served as a tuberculosis sanatorium.
It also housed mustard gas and machine gun victims during World War I, including a young soldier named Adolf Hitler.
The hospital later went on to be a major treatment center for Nazi soldiers during World War II, and it was used as a Soviet military hospital from 1945 until the fall of the Berlin Wall.
Today, a few wards are used as a neurological rehabilitation center, although the majority of the complex is abandoned.
The surgery and psychiatric wards have both been left to decay and give way to nature (and vandals), and the result looks like something straight out of American Horror Story: Asylum.