Not the walls, but steps similar to what I have drawn in plan view so far Check out retaining wall projects from exceptionalstone.com!
Terraced backyard More
backyard kids play area ideas | The steep gradient of this Double Bay garden rendered it inaccessible ...
Terracing Mosman Landscape Design: Outdoor Establishments
RHS Hampton Court Palace Flower Show 2011 | Heathers In Harmony Garden | Designer: William Quarmby
backyard ideas...The San Francisco Envy Chain - NYTimes.com
Bristol Road Residence. Transition garden with grass terraces
Breathtaking natural stone walls in the garden. We can make this your reality! Landscape St. Louis: http://www.landscapestlouis.com/contact/
Linsteadt Mediterranean edible kitchen rose garden California ; Gardenista
Clever landscaping idea. Could do something similar along the side yard where we'd like to reshape our slope and put a terraced garden and hot tub in.