Cheap and easy protection for solar landscape lights. Drill a 1 hole as deep as your spade bit will go, and drop in your light. Now they wont fall prey to the mower, weed wacker, or clumsy people. Great for walking paths, or around the fire pit.
In the form of gabion you can build a garden bench, stands for flowers and so on. Field for the imagination here is unlimited. In fact, gabion is a structure of metal mesh of the desired shape, filled with stones. 37 Original DIY ideas for garden