Sit down in the dirt. Build a little mound. The dirt you are sitting in would be a good building material. For fun, go get a little flag and bring it to the scene. It can be any flag: your coat of arms, a picture of your cat, a Bob Marley banner, whatever tickles your fancy. Attach your flag to a toothpick and jam it into the ground at its peak, where none of the mound you just built is higher. Declare this spot the summit of the mountain. Congratulations, you’ve just built a mountain and identified the high point.