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 NearbyAccommodationsAntietam's Jacob Rohrbach Inn B&BLearn MoreAccommodationsAntietam Overlook Farm Bed & BreakfastLearn MoreAccommodationsClipp's Mill and Log CabinLearn MoreAccommodationsThe Inn at AntietamLearn MoreAccommodationsAntietam Guest HouseLearn MoreSee More For Western Maryland