Outdoor fires are so hot right now. Seriously. Mankind has called the hearth home for the centuries, it's true, but these days people are going ultra-retro and getting their heat from stone-walled pits set into the earth. And, why not? On cool summer nights, you can melt marshmallows and nibble s'mores while you lounge in an Adirondack chair, feet propped up on the rock ledge. So if you really want to light up right, do it in style. Take a few days to build your very own ring of fire.