What first caught my eye about this was the shadow on the wall.
Crisp and clear, with varied opacity through the bottle, I couldn't resist making it my photo of the day.
Then, as I was trying different angles, I noticed that it was somewhat symmetrical if I placed the shadow from the door frame in the middle of my viewfinder.
Unexpected, but interesting!
Camera: Canon 40D 1/125s, f/4.5 at ISO 400 in sunlight at about 6:15 p.m.