A retaining wall is a structure that is made to retain or hold back the soil behind it. Generally, it is used to keep the soil in its place between two different elevations. For instance, a basement wall is a retaining wall. Sometimes, the retaining wall must resist water pressure as well. It could be made of several types of materials such as poured concrete, concrete blocks, boulders, rocks or even timber. Retaining walls provide a useful combination of practicality and visual appeal. Not only do they hold soil and stabilize the landscape, but they also give a sophisticated look to the surroundings. Here are some essential facts about retaining walls.