Harsh weather? Energy shortages? Nuclear fallout? These and other calamities would render most houses unlivable. Not these weird and wacky residences, though. Built to endure man-made and natural disasters, these indestructible abodes can stand up to just about anything. They've long delighted preppers, survivalists, and security experts. Now take a look for yourself to marvel at some of the most adaptable, resilient homes ever built.