Choose a flat, open area and mark a circle about 4 feet in diameter. Then remove grass and dig down 4 inches.
Fill the base with 2 inches of gravel for drainage and tamp it flat.
Place the first layer of retaining wall blocks in a tight circle, using a level to ensure evenness.
Stack two more layers, staggering each block seam for better stability. You can insert the steel fire ring in the center.
Fill the inside with lava rocks to promote airflow and protect the base from heat damage.
Spread white gravel around the pit, creating a 1–1.5 ft border to prevent grass from encroaching and to give a clean, finished look.
