One of Fort Knox's remaining 15-inch Rodman Guns. This is one of 325 that were depended upon through the 1880's to defend America's coastlines. Despite this gun's lack of rifling, no armored, modern warship of the 1870's or 1880's could trade shots with a 15-inch Rodman at close range and expect to escape unscathed. And oh look, there's Battery A's hot shot furnace as well.