St. Simons Lighthouse stands as one of the southeastern United States's most historically significant maritime structures and simultaneously one of North America's most comprehensively documented haunted lighthouses. The lighthouse was constructed and first illuminated in 1872, representing a significant technological and structural achievement necessary to serve maritime interests depending upon St. Simons Island's geographical position at the confluence of the Atlantic Ocean and Georgia's coastal sounds and inlets. The original structure embodied nineteenth-century lighthouse engineering standards, with the tower designed to project a warning beacon across treacherous waters that had claimed numerous vessels before the light's establishment. The location positioned the lighthouse within one of the Southeast's most historically complex regions, an area with deep indigenous historical significance, colonial period French and Spanish settlement, and subsequent English colonial and American development accumulating centuries of human presence before the lighthouse's construction. The specific event establishing St. Simons Lighthouse's most prominent paranormal reputation occurred in 1880, when a violent confrontation between Frederick Osborne, the lighthouse keeper, and John Stephens, Osborne's assistant, resulted in Osborne being shot and killed within or immediately adjacent to the tower structure. The precise circumstances, motives, and sequence of events culminating in Osborne's death have been extensively documented in historical records and contemporary accounts, establishing the event as a singular dramatic incident generating lasting paranormal consequences. The death of Osborne within the tower appears to have created a strong spiritual connection between the deceased keeper and the physical structure, manifested through documented paranormal phenomena spanning more than a century following the shooting. The lighthouse keeper's responsibilities, involving maintenance of the light mechanism, regular tower ascents via spiral staircase, and constant vigilance regarding beacon operational status, created intimate familiarity with specific spaces. Paranormal investigators have documented extensive phenomena at St. Simons Lighthouse, with the most prominent manifestations concentrated in the tower interior, spiral staircase, and window areas where the light mechanism was maintained and operated. Apparitions attributed to Frederick Osborne have been reported by multiple witnesses at various periods spanning more than one hundred years, with descriptions consistently identifying a humanoid figure recognizable as the deceased keeper visible in specific tower locations. The apparition has been observed ascending and descending the spiral staircase in purposeful manner, consistent with the keeper's regular operational duties. Disembodied voices have emanated from the tower interior, interpreted by investigators as potentially the deceased keeper attempting communication or replicating verbal elements of normal duties. Physical sensations have included perceptible presences and intelligent contact, with some reports describing the sensation of being touched or guided by unseen hands. Temperature anomalies within tower areas have been documented by paranormal investigators, with sudden cold spots appearing and disappearing in patterns consistent with conscious manifestation. A remarkable 1908 historical incident reportedly involved Osborne's apparition engaging in maintenance activity on the light mechanism itself, an intervention potentially preventing malfunction or danger to beacon operational status. This event, spanning nearly three decades following Osborne's death, represented the most profound documented evidence of the deceased keeper's apparent inability or unwillingness to relinquish professional responsibilities and attachment to the specific structure. Mary the Wanderer, a female spirit associated with St. Simons Island, has also been reported at the lighthouse, with witnesses describing a lady figure potentially representing a distinct entity or spiritual companion. St. Simons Lighthouse has been ranked among the nation's most haunted lighthouses and recognized as one of the most actively investigated paranormal locations in the Southeastern United States, with its documented phenomena establishing one of the most comprehensively evidenced examples of a haunted maritime structure.