The view to the east from the roof of the Pennsylvania Monument looks across the fields along Pleasonton Avenue toward Taneytown Road in the distance. This was the rear area behind the Union lines, relatively sheltered from the battle, filled with reserves, the wounded, and the skulkers.
The castle-like monument beside Pleasonton Avenue honors the 15th and 50th New York Engineer Regiments. Further along the avenue are smaller monuments to the Engineer Brigade and the United States Battalion of Engineers. None of these units were at Gettysburg but all were heavily involved in supporting the Army of the Potomac, primarily building and maintaining pontoon bridges across the Potomac used by the army on its march from Virginia.
Past the engineer monuments and almost hidden by the trees is the farmhouse of Jacob Hummelbaugh. This was a field hospital for the Union Second Corps, and handled many of the casualties from the fighting on both July 2 and 3. Confederate Brigadier General William Barksdale was brought here after he was mortally wounded leading his brigade and would die here on July 2.
Appropriate to the nearby engineer monuments is the large National Park maintenance compound. Headquarters to the staff that endlessly work to keep the battlefield in good repair in spite of its hundreds of thousands of visitors, the complex also includes workshops that can provide major repairs to the monuments and artillery pieces on the battlefield.