Halfway up the escalator at the Pentagon City metro stop, it occurred to me that this is a sight that deserves more attention than it usually gets. Like so many others, I often race up the moving stairs, hoping to catch the bus. What a striking view it is, a collection of gentle arcs and converging lines. On this particular day, with the leaves barely starting to emerge, the tracery of the tree branches formed a delicate, organic counterpoint to the orderly structures of the escalator and its glass cover. I rode back down to the bottom, got on the "Up" escalator again and took this photo to preserve the moment.