Sloss Furnaces National Historic Landmark
Former ironworks Birmingham, AL
Sloss Furnaces produced pig iron from 1882 until 1971 and is now a museum and National Historic Landmark. Local legend holds that a harsh foreman nicknamed "Slag" still prowls the catwalks, and night-shift stories of pushes and voices have circulated for decades, though historians have found little to confirm the tale.
Visiting: Open as a free museum with a seasonal Halloween haunted attraction; check the official site for schedules.