Retaining Wall Blocks and Landscape Wall Blocks are the first choice in wall design. Ideal for building retaining walls to hold back a hillside, or a freestanding landscape walls to divide your yard. This selection of retaining wall block are vailable in sizes, styles, and colors to compliment any architectural style. Landscape Retaining Wall Blocks for small to mid-size retaining walls from 0'–6'. Structural Retaining Wall Blocks for retaining walls between 3' and 50'. Start your wall project with our full line of Keystone and Bella Vista retaining wall blocks.