Fort Henry opened in 1832 as a British garrison fortress overlooking Kingston harbour, its limestone bastions designed to repel American invasion. By the 1890s its military purpose had lapsed, yet officers' quarters, powder magazines, and drill squares remained intact — a forty-three-acre time capsule of Imperial defence architecture. The fort closed officially in 1891, was nearly demolished, and reopened as a living-history museum in 1938, its restoration funded by Depression-era relief work. Today it stands as a UNESCO World Heritage component, one of the finest examples of nineteenth-century British military engineering in North America. The garrison's afterlife began during its abandonment. Soldiers reported unexplained footsteps in empty barracks, lantern light in sealed chambers, and the scent of gunpowder long after the last cartridge was fired. Contemporary accounts describe a sentry who drowned in a well beneath the officers' quarters, a private shot for desertion near the southwest bastion, and a young bride who died of fever in married quarters overlooking the parade ground. These narratives, catalogued by archivists and reinforced by decades of docent testimony, form the scaffold of Fort Henry ghost tour tickets tours offered after daylight hours. Limestone holds temperature; corridors remain cold in August, and acoustic anomalies — voices, dragging chains, boot-fall — occur with enough regularity that Parks Canada acknowledges them in interpretive materials. Architecturally, the fort's star-shaped plan and interconnected casemates create natural theatres for paranormal storytelling. Powder magazines, damp and windowless, amplify sound; the Martello tower offers views across the St. Lawrence but also a vantage where sentries stood watch through winter storms. Guides lead small groups through lamp-lit passages, pausing at locations tied to documented deaths or recurring phenomena. The fort's military lineage — uniforms, muskets, discipline — grounds the experience in fact, distinguishing it from generic haunted-house spectacle. Evening tours typically run May through October, timed after the daytime re-enactments conclude and the site empties of families. Reservations are required; walk-up entry is not guaranteed during autumn weekends when demand peaks.