Illustration layout ideas

I have decided to use a circle boarder and work inside of the circle so i can then make a symmetrical design so it looks tidy and professional, but i suppose an illustration doesn't need to look neat and tidy.

I have been concentrating a lot on the amazing architecture but i need to think about the small detail instead of the obvious detail. I'm going to look back at my photos and figure out what i can use to make a successful illustration.

The illustration on the left i really like because it has good imagery, its simple, its symmetrical, but it doesn't stand out as much as i would like it to do.