That photo could start a small discussion. I never saw this area before the tunnel was built, but the tunnel both facilitates and obstructs pedestrian circulation in the area. Facilitates, by connecting the Science Center plaza directly to the north gate of Harvard Yard, removing any intervening street traffic. Obstructs, by forcing all pedestrians to use this path and making it hard to walk any other direction (such as from Johnston Gate to the Harvard Epworth Church).
Anyone know where I can find photos of what this area looked like before the tunnel?