Rope lighting in flower beds. This works perfect for lighting a walkway. I used the rope light holders that stick in the ground and cut off half the spike.
two tier natural formed rock retaining wall - front
Rock Garden on retaining wall. - Gardening Gazette (Garden Step On A Slope)
Garden, Sloping Garden Landscape Designed With Stoned Steps Walkway Between Decorative Flower Beds Retaining Walls Idea ~ Fabulous Retaining Wall Ideas