Did you know that there are over 17 million shipping containers in the world, with only a fraction of them being used? That means there is a vast potential for repurposing these containers into something useful, like an underground shelter or root cellar. But why should you consider using a shipping container for these purposes? Well, besides the fact that it offers a durable and secure structure, it can also provide a hidden and protected location for your belongings or family. And that's…