2 Waverly Hills Sanatorium, Louisville, United States

A school that was turned into a sanatorium by The Board of Tuberculosis Hospital and meant to initially only accommodate 40-50 tuberculosis patients. However, tuberculosis soon became and epidemic and it was clear that they had to expand the hospital.

Eventually, the Sanatorium was large enough to accommodate over 400 patients, but the number of fatalities outweighs this by thousands. Urban legend claims there were over 63,000 deaths, however, the hospital states it was merely 8,212. The Waverly Hills Sanatorium has been the nesting place for numerous ghost hunters and it is seen as one of the most haunted spots in the United States.