A short retaining wall that creates dedicated planting beds easily distinguishable from the grass lawn.
Interesting ideas for you garden
How to build a retaining wall | Garden Gate eNotes
How to Properly Do a Retaining Wall... I like the look with caps :)
Build a Dry-Stacked Stone Retaining Wall - Fine Gardening Article
boulder retaining wall design - like the use of large and smaller boulders
Retaining Wall Design Ideas by Utopia Landscape Design - This page has lots of different wall designs and materials.