Go into Concord center on Route 2A and take a right on Monument Street. Parking for bridge is about a half a mile down on the right and the bridge will be on your left.
I crossed the Old North Bridge in Concord and found an interesting "architectual" like angle of the bridge itself with some of the wonderful New England fall foliage as a backdrop. This was taken in mid-October when the foliage was about at its peak. This holds a lot of significance for me as I love American history. One of the most important battles of the Revolutionary War was fought here at this very place and it is awe inspiring just to visit.