I’d heard of Centralia before, but first read about it in-depth this summer. I was reading Bill Bryson’s A Walk in the Woods on a plane when I came across his description of it. He stubled upon it on his trek up the Appalacian Trail. It’s a fascinating and tragic place. http://www.treehugger.com/files/2009/12/underground-coal-fire-centralia-started-1962-burns.php