Castillo de San Marcos
300 years worth of spirits may lurk within the star-shaped walls of Castillo de San Marcos
Haunted Forts
With the ghosts of long dead soldiers wandering, military forts are often some of the most haunted locations in the United States
Presidio La Bahia
Once the site of a bloody massacre, Presidio La Bahia is reportedly haunted by those murdered souls
Old Fort Niagara
Fort Niagara, once a military fort for three separate nations, is now known for its headless ghosts
Fort Knox
Though not a fort full of gold, Maine's Fort Knox might just be full of ghosts
