WALL
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Mark boundaries; Give privacy; Give protection/security; Can be a retaining wall (cut and fill); a feature in its own right “Moon wall”; part of the overall design (walled garden/balustrading); a growing area for plants; Brick/block/reconstituted stone – to match the building and use the same bonding for cohesion (man-made); Stone/slate/flint – LOCAL to the landscape and buildings (natural).