Gravity retaining walls actually are concrete crib walls which are made form interlocking elements. These walls are with free draining materials which help with the elimination of the dangers of hydrostatic pressure from behind the wall. Importantly, these walls can fit into any budget, because they are low cost. More precisely, they are not expensive, and also they can be used on many places. For example, gardens, building sites, or driveways. Generally, although the building is not hard, you will need and engineer that will give you the correct instructions.
Gravity Retaining Walls from Concrete
See the pictures and the link below for more information.