This was an old British fort during colonial times
A quick look inside the fort
The non-traveling editor will add some additional information about Fort Frederick (click link to visit their website)
The stone fort built in 1756 protected Maryland’s frontier settlers during the French and Indian War. Fort Frederick is unique because of its strong stone wall, large size, and roomy barracks. Fort Frederick also saw service during the American Revolution as a prison for British soldiers. For the next 131 years, the fort and surrounding lands were farmed. During the Civil War, Union troops were often stationed near the fort to guard the C & O Canal. In 1922, the State of Maryland acquired the fort. During the Great Depression of the 1930’s, a company of the Civilian Conservation Corps restored the fort and began development of the state park. In 1975, the park reconstructed two soldier’s barracks inside the fort.