Fatwood makes an excellent fire starter and comes from the heartwood of pine trees. The heartwood of pine trees becomes resin impregnated, hard, rot-resistant and water resistant. An old stump on the ground after a tree has died and fallen over usually is an excellent source of fatwood but it can also sometimes be found where the tree limbs connect to the main trunk. In this video, I find an old stump and dig up a large chunk of fatwood, process it and start a fire using only fatwood and my ferro rod.