For a self-contained outdoor fire with built-in cooking posts, the Swedish torch can't be beat. All you need is one log and a chainsaw.
The beauty of the Swedish torch is that once you light it, it requires minimal maintenance. The log will slowly burn from the inside out. The cuts through the log provide natural air flow that will keep your fire ventilated. It also doubles as a cooking surface and is perfect for holding cast iron pans.
Find a log about 25cm in diameter and at least 50cm in height. Make sure that at least one end of the log is cut level so it will stand up straight on its end. Take your chainsaw and make three crisscrossing cuts about ¾ of the way through.
You can start your torch by lighting a small fire on top which will eventually burn down into the log. Kerosene or lighter fluid applied to the center of the log will also help get it going. Check out the link below for full instructions with step-by-step pictures. As always, pay attention to any current fire bans, never leave a fire unattended and make sure you extinguish any embers when finished.
Swedish Torch [Instructables]