Harlem Valley Psychiatric Hospital opened in 1924 in Wingdale, New York, as a way to help with overcrowded asylums. Over the years, it became known for using electroshock therapy and experimenting with early psychiatric drugs. At its peak, thousands of patients lived there, going through treatments that were sometimes groundbreaking and sometimes questionable. By the 1990s, mental health care was changing, and fewer people were sent to institutions like this. The hospital shut down in 1994. Today, some of the buildings have been repurposed, but a lot of the old hospital still stands, giving it a creepy, abandoned feel.