Another way to use the stones is that you create different heights in your garden. You can make a structure that is a little above and where you have a set of different flowers or plants that are down.
This medium can place stones forming a strong structure. You can create a small wall of two or three lines of stones.
If you have a sort of pond, place stones around. You will get almost poetic composition. In this case it is better that are not as ordered but leave freely.