Voted : Athens Lunatic Asylum ~ Athens, Ohio
Athens, Ohio is said to be one of the most haunted places in the USA, and is reputed to contain many ghosts. When drawing a line from each of the five cemeteries around Athens, it forms a pentagram with the center being Ohio University. Ohio University is also considered by some to be the most haunted campus in the USA, as is the former state hospital, Athens Lunatic Asylum, located right near campus.
Voted : The Byberry Mental Hospital ~ Philadelphia, Pennsylvania
Oh, what a fun place to visit. :P
My paternal grandmother, Deity rest her magnificently, drove me up to the gates once, and regaled me with a few tales. Don't worry. She didn't scar my psyche irreparably. I was insane long before then. ;-)