The Old Jefferson County Jail in Monticello, Florida, is considered a haunted location in a town known for its paranormal activity, with reported phenomena including loud clattering sounds and banging on the jail cell walls. Ghost hunters have experienced such occurrences, along with whispered words and unusual electromagnetic field (EMF) readings within the former jailhouse. Visitors and investigators have reported loud, unexplained clattering sounds and banging noises coming from the jail cells. Whispered words have been heard within the jail. Paranormal investigators have detected high electromagnetic field (EMF) readings, which can sometimes indicate a paranormal presence. Monticello, Florida, is frequently referred to as "The Most Haunted Town in the South".