My first attempt of the task:

I am not sure what I think of this because of the photo and the fact that the bunker in the foreground is too big to put in one circle.

Then I developed my ideas and made these:

The above slide shows me using the content aware fill to remove some of the larger imperfections.

i chose this photo because the main subjects (the ends of the piers) are small enough to fit in a circle and i can get the sun and the reflection in it to.