Retaining walls restrain soil from otherwise washing away from a foundation or landscape. Many are made of stacked stone, timber or concrete, where they can provide a tight barrier, unlike a living cedar tree, that does not provide a solid, sturdy wall.
About this Author
Callie Barber has been writing professionally since 2002. Barber's love for design and writing inspired her to create Design Your Revolution, a blog that shares creative and affordable ways to decorate indoor and outdoor living environments. Her articles have appeared on Travels.com and GardenGuides.com. Barber holds a Bachelors of Arts in international studies from the University of North Carolina.