Fort Klock was built as a fortified farmhouse in 1750 during the unsettled times of the French and Indian Wars. Its two-foot-thick limestone walls have loopholes on every side so people inside could defend themselves, and a small spring in the cellar could provide water. During the American Revolution, the house again served as a refuge for local families when enemy raiders swept through the valley burning crops and farms. In October 1780, British troops under Sir John Johnson fired on the house, but the heaviest action occurred west of here in a field belonging to a Klock relative. Today the site is a National Historic Landmark open as a museum with a full schedule of historical reenactments, craft fairs, and educational programs.