This set of photos would focus on curbs and sidewalks, with closeup shots to emphasize the detail in mundane things we normally walk over. The photos would all frame the sidewalk or curb as a dividing line between something flat and something more detailed, like in the example. I'd get pictures of weeds or wildflowers, asphalt and dirt and rocks, cracks in the sidewalk, shade and full sunlight, etc.
The idea is to make something interesting out of something we take for granted due to its abundance. A crack in a sidewalk isn't very interesting in the grander context of the world, but I find it to be really cool when you stop and examine it.