Depth is added by including the foreground.
In this case the rocks were in the foreground. This worked out perfectly since I used a timer and the rocks were "in the way". So I just took the photo, but it tells the story of the rocks we climbed on.
My daughter, Hannah, and I counted the steps up the stairs to the peak of Mt. Bonnell. There were 104 on the way up and 106 on the way down (it's a mystery!)
When we got there she kept asking me to take her picture. This one turned out the best.