ice cave collapse
Posted: Jul 7, 2015 9:14 am
In Washington State, near Mt. Baker:
http://www.nbcnews.com/news/us-news/thr ... in-n387756
http://www.nbcnews.com/news/us-news/thr ... in-n387756
The Official Caving Forum of the National Speleological Society
http://forums.caves.org/