I don't have any photos actually taken during the construction process, but we excavated the site which made it about one metre deep and it has a shelf all the way around which is the level of the lawn. Another photo is enclosed.
It was of course made with "new" railway sleepers and using "TimberLok" screws.
Roger Lee
Witney, Oxfordshire
RAILWAY SLEEPERS USED:
New Pine railway sleepers
2400mm x 200mm x 100mm