If you're looking for a way to enhance your garden, you could construct a retaining wall. While you'll have plenty of options in terms of materials, concrete provides a versatile and malleable substance that contractors can embellish in endless ways. Consider the following reasons to construct a concrete retaining wall in your garden. Level the Land One purpose of a concrete retaining wall is to level out a hilly garden. You can cut into the slope to create tiers, and the concrete wall will form a substantial barrier to hold back the soil.