There's one a few minutes outside of Annapolis, MD. It was an African American mental hospital and the shit that went down there is unfathomable. Even after desegregation and even after the Nuremberg trials, which dealt explicitly with human rights, the treatment and torture of blacks there was unreal. There's something like 1600 unmarked Graves and over 30% of people who were sent there died. It was a concentration camp for Baltimore's mentally ill, homeless, or other "detriments of society."
http://darkroom.baltimoresun.com/201...te-hospital/#1
https://www-capitalgazette-com.cdn.a...730-story.html