"Many people ask us how could one survive a major disaster, whether natural or man made or a combination thereof. One way nature protects its critters is getting them under ground. Ground hogs and ants are good examples. They have been around for a long time. So has nature.
A properly built and installed underground shelter is an excellent way to improve your chances for long term survival. The Survival Center has been building and installing under ground shelters since the late 1970’s. Over the years we have refined what really works well and not so well."- Survival Center
Survival Center Store - They Ship To Canada
Here you can find pictures and greater detail about the underground shelters they are selling.
Survival Center - Underground Shelter Information