Steel and lumber retaining wall, modern design, reused elements. For a fence? I think I know a guy that can help...
Cement retaining wall Looks Like Wood | retaining wall services | Apex Retaining Walls
Corten steel facing on a "traditional" retaining wall.
Stamped Concrete Retaining Walls, Stamped Concrete Retaining Walls ...
concrete sleeper retaining walls - Google Search
Creative Sleepers- Concrete Sleepers || Retaining Walls || Adelaide & Brisbane
Concrete Sleeper Retaining Walls Adelaide
concrete sleepers retaining walls
Curved timber retaining wall with vertical railway sleepers, great against a lawn. Very low maintenance