That's a tough question. Only one? Well, the sky is important to me. A white lighthouse against a blue sky will certainly look better than puffy white clouds. Angle is another factor. I took one of Ponce Inlet from the bottom base of the lighthouse and the lighthouse looks even taller than it is. Of course who knows what the judges are looking for. I have picture of the stairs and an open window at Hillsboro from the inside view that I like very much, but would the judges? I also have a picture of a chimney of a keepers house, the walls and roof are all gone. If I could only enter one it would most likely be a total view of the lighthouse at an angle most people don't take.