Antietam FurnaceVisit WebsiteGet Directions Details Details Built in 1768, the furnace produced goods for the Revolutionary War, relying on the labor of both enslaved and free blacks. National Register of Historic Places. Hours See website for hours. Location3912 Harper's Ferry RdSharpsburg, MD21782Get DirectionsContactMapWestern MarylandPlaces NearbyAccommodationsClipp's Mill and Log CabinLearn MoreAccommodationsAntietam Overlook Farm Bed & BreakfastLearn MoreAccommodationsAntietam's Jacob Rohrbach Inn B&BLearn MoreAccommodationsInn at AntietamLearn MoreAccommodationsAntietam Guest HouseLearn MoreSee More For Western Maryland