thefloridianguy.com

thefloridianguy:  Wow, everyone has to listen to the first 3 minutes of this video if nothing else, he has documented evidence this is a nuclear explosion around 1950-60s that caused that sinkhole in Louisiana.

The roaring sound heard in the second video I would hazard to suggest that it is gas escaping from the sinkhole.

http://beforeitsnews.com/alternative/2012/10/wow-2053-nuclear-explosionsla-sinkholestrange-rumbles-roaring-sounds-heard-2477080.html