pine treated sleepers - Google Search
Small Sloping Garden Design
Tiered Raised Garden Beds - perfect for square foot gardening without taking up a ton of yard space
Retaining sleeper walls
Retaining sleeper walls...DD: Before and after pix of creative outdoor living ideas many for small spaces.
garden retaining wall ideas - Google Search
railway sleeper retaining wall - Szukaj w Google
This might work for the goldfish pond. Just make the bottom container big and deep. But where in the yard to put it? Against white fence instead of in a corner?
This sloped garden has curved landscaping with the slope held back with vertical wood panels... again, in-line with our thoughts but using sleepers