I did this shot a few years back, from Memorial Bridge, that visualized the approach path into National Airport. I have always intended it to be a series of photos. I had time to head out and get another last night.
While I was waiting for the sun to fall below the horizon, the boathouse and river looked quite gorgeous jut before sunset.
Here's the older shot (if it looks familiar, it was in ExposedDC's 2016 Show).