Fascinating. It's hard to even comprehend an underground coal fire that could burn for 250 years - though apparently the oldest known coal seam fire has been bu

Fascinating. It's hard to even comprehend an underground coal fire that could burn for 250 years - though apparently the oldest known coal seam fire has been burning in Australia for 6000 years! http://en.wikipedia.org/wiki/Burning_Mountain http://en.wikipedia.org/wiki/Burning_Mountain Centralia on Google Maps: https://www.google.com/maps/@40.8006547,-76.3428604,287m/data=!3m1!1e3 https://www.google.com/maps/@40.8006547,-76.3428604,287m/dat...