Have you ever taken a photo of something and looked at the photo later and the camera didn't capture the grand scale of the scene you went and visited?
Its because the camera cannot capture the whole scene, only what you see when you look in the back of the camera.
Here is a way in which you can show the size of something you photographed. You put a subject into the scene in which people can identify with.
In the photos in this post I demonstrate that by putting a person into the photo, you can scale the photo to portray the reality of what you were photographing.