Mowing strip around patio. Helps prevent dogs from digging underneath too!
Sleeper Retaining Wall - Frogley Fencing
Build a Retaining Wall | Landscaping | Landscape Care & Ideas
rendered garden wall - Google Search
Bench, steps & raised bed made of railway sleepers. Fairly plain layout but useful for ideas. Might need anti-slip coating for wet-weather. Like the bench to the right (mostly out of picture).
sleepers retaining wall - Google Search
sleepers in gardens - Google Search
Retaining sleeper walls...DD: Before and after pix of creative outdoor living ideas many for small spaces.