Ground cover or rock.

There is a new style of covering ground with decorative rock.
I remember a number of years ago I saw two neighboring yards that were cover with lava rock and nothing but lava rock. One yard was in a terra cotta color and the other in black lava. The yards were completely flat and naked except for the two colors of lava rock.
Recently the concept of covering ground with decorative rock has changed from using one type of rock to a couple sizes of rock to create a pleasing design.
By using a serpentine fashion one can give the most mundane landscape situation and interesting and pleasing thing to see.
I took this photo of the medium on 104th Ave in Adams County, Colorado. The grass in the photo is called Blue Fescue and is a Colorado native grass.