Tips on how to decorate the inside of your underground shelter This is a fun video of kids showing how to prepare for the end of the world! Final attempt to record building of an underground shelter using a 20 ft. shipping container. This is the fastest most economical and environmentally friendly choice to make when deciding how to go off grid to live. These underground bunkers are truly beautiful and ready for an extended stay underground. They have everything you need in the case the world is about to end.