The Bottom Corner
In the bottom corner, I leveled out the area as much as I could and removed the concrete path. I moved a heap of the dirt from the upper end of the area to the lower parts, and also moved some dirt from other areas of the yard. Once this was done, I killed all the grass with Round Up. Once this was done, I layed weed cloth onto the dirt covering the entire area.
This area was then covered with eucalyptus mulch taken from a tree that I needed to get removed. I really did not want to get rid of the tree, but it was too sick and dangerous. The mulch and wood chip covered the entire area at 15-20cm deep. Since this photo was taken, the area has been filled with pot plants significantly improving the look of the area.