Beelitz Heilstätten in Germany
This eerie hospital complex in Beelitz was open from 1898 to 1930, treating wounded soldiers during World War I, including a young Adolf Hitler. It later served as a military hospital for the Nazis until the Russians took it over in 1945. Although the neurological unit remains operating, the rest of the compound has been abandoned. A serial killer known as The Beast of Beelitz has stories of strangling women with pink lingerie before being detained in a psychiatric ward. In more recent times, a sadist and photographer reportedly beat a young female model to death on the grounds in 2008.