The Montgomery County Council posted a neat photo to Twitter which shows the construction going on in downtown Bethesda. Of interest is the lower half of the image which shows the old Georgetown Branch right of way. On the right is the Air Rights building, which straddles the tracks. Next to it is Wisconsin Ave, where you can see the bridge crossing the tracks. (it is the concrete section.) The cribbing you see is approximately where the right of way exited the Wisconsin Ave underpass and continued on to the South. The line curved down toward the bottom of the photo. Just above the right of way you can see where old sidings branched off from the main track near where the concrete parking lot is. Pretty spiffy!