Eastern State Penitentiary, located in Philadelphia, Pennsylvania, is considered one of the most haunted places in America. Built in the mid-1800s, it operated as a prison until 1971 and gained notoriety for its harsh conditions and solitary confinement practices. Numerous reports of paranormal activity have been associated with the penitentiary, including sightings of ghostly figures, disembodied voices, and unexplained phenomena. Visitors and staff have reported encounters in the prison's dark corridors, cell blocks, and solitary confinement cells. The site has been featured in paranormal television shows and investigations over the years, further solidifying its reputation as a haunted location.