These are the Alien and Predator fire pits welded together by metal artist Burned By Design from old propane tanks (previously: this Lord of The Rings Witch-King version). They make the perfect fire pits for the person who already has everything. Or the person who doesn't have anything, because hobos have to build fires to stay warm at night.
Keep going for several more shots of both, but check out the artist's Facebook page for pictures of the whole process.
Thanks to carey, whose fire pit looks like a hole dug in the ground with rocks around it. Classic!