Crime scenes are always shot with something to give scale. I nature that is sometimes also required to allow the viewer to get a full sense of the size of something. The sand dunes of Namibia can look quite small in photographs when all you see are the dunes. It is only when you add something to provide scale that the real magnitude of these giant sand dunes are portrayed justly.

It is the proportions of the dune in comparison to the trees that makes you realize the true height of the dune. Do something to show the scale when shooting something large. Place a person or something in the scene that people know the size of so that one can compare the difference.

          Also play with lines. They are always great for composition when used correctly (you don't want lines to lead out of your image). Curved lines are always better than straight lights as they just tend to be more dynamic.

          Play with light and shadows. Lastly, the tip of the sand dune also catches some sun light. That light helps to draw the eye up there adding to the sense of scale and height.