I was up on the old abutment for the C&O Canal viaduct that connected the canal from Georgetown to Alexandria over the Potomac River and looked down to the boat dock for the Georgetown Boat House and caught this composition. I had been photographing Key Bridge with my 5×12 (previously described here) when I looked down and saw this scene which cried out to be shot in the format.
The simple geometry and the contrast between the rigid lines of the dock broken up by the deck chair contrasted with the smooth water of the river really makes the image. Without the deck chair, it would actually be pretty boring. But adding that one small compositional element makes it go from so what to interesting.