Updated by popular demand. I've decided to put up a quick post because there has been a lot of interest in how I built this fire pit. So, here we go.
First, dig a hole the size you'd like for a fire pit. This is about 40 inches x 40 inches with a depth of about 9 inches.
Lay out the cinderblocks in a square and level. Fill in with some of the soil that you dug out.
Next, lay some decorative bricks on top. Once in place, dump soil or sand on top of the bricks and try to rub it into the seams.
TA DA! You have a simple, cheap fire pit that is easy to maintain, easy to fix, and easy to remove.
THANKS and please let me know if you need anything or have any questions!