Even if you limit yourself to the 11-point self-guided driving tour, do stop at the Cornfield, site of "the single bloodiest day in American History," and the somber 'sunken road' - excellent exhibit markers at each spot describe the sacrifices and gallantry involved in keeping this nation together. Do they even teach this in school anymore? More details in the video and ranger-guided tours. View of battlefield, which is interspersed with current private homes and working farms, from second floor of visitor center. A drive thru Sharpsburg itself stirs patriotic feeling with the rows of private homes and businesses displaying the Stars and Stripes.