Humans have been building retaining walls for thousands of years to create flat, or gently sloping, terraces on hillsides. A lot of my readers have them on their own property — or need to build ...

Richard shows how to maintain a mini split; Mark and Jenn build a garden retaining wall.

Building a stackable retaining wall may seem like a project for a professional, but it's actually something you can do yourself. Here's how.