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Originally posted by scepticalwatcher
OK wait, I just had a brain storm. You've heard of the ring of fire, right? The ring of volcanoes all around the pacific rim. I don't think its too hard to believe that the volcanoes themselves may be connected, magma tubes or whatever, afterall, they are all resting on a comon tectonic plate (mostly). Not all magma tubes have magma in them at all times...Hmm. I kinda lost my train of thought. All I'm saying is this, BF are mostly seen in the pacific northwest, right? Also happens to be on the pacific rim. makes the underground travel more plausible. Still kinda sketchy, I agree.