Gravity walls depend on their mass (stone, concrete or other heavy material) to resist pressure from behind and may have a ‘batter’ setback to improve stability by leaning back toward the retained soil. For short landscaping walls, they are often made from mortarless stone or segmental concrete units (masonry units).[7] Dry-stacked gravity walls are somewhat flexible and do not require a rigid footing in frost areas.
— https://en.wikipedia.org/wiki/Retaining_wall

As you can see, the retaining walls do serve their purpose well, but can also be a great focal point to the landscape.

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