Retaining Walls are not made out of pavers, but a similar material, made out of concrete mix and the manufactures call it Wall Blocks. This wall blocks can be used to form planters, steps, summer kitchens, supports and edges to even out a backyard.
A nice light feature can be installed in retaining walls and benches, it is called hardscape lights and its attached to an outside outlet.
Retaining walls are made out of wall blocks. Tremron and Belgard are local manufacturers in North Jacksonville an their popular wall blocks are Stonegate and Weston.