This Sightlines post looks up and down Massachusetts Avenue from the Carnegie (or old Central Public) Library (dead center in the photo above) to Columbus Circle in front of Union Station (look for the three flags in the center of the photo below). You’ll need to zoom in to see either of them.
Looking northwest towards the Library, you get to see how the new Mass Ave Valley will look adorned with 455 Massachusetts Ave, the newly completed office building, and The Dumont now sporting its brick facade but still under construction on the right. Having two Esocoff designed buildings, 400 Mass Ave and The Dumont, don’t lend to much architectural diversity at this intersection. Looking southeast, the view is more commercial with office buildings and the Gales School [PDF] (red brick building on left behind the crane) in the near field view.
Mass Ave Valley will have some day and night pedestrian appeal because of all the new residential and office construction, the urban trail that leads to the Penn Quarter and the upcoming Safeway at CityVista and (hopefully) trees planted after finishing construction. Walking down to Union Station doesn’t seem all that interesting unless you’re heading to The Irish Times or catching the Amtrak.