There are plenty of ways for the world to end. If it does, will you be ready?
Owners of these homes can live out the end of days in safety, security and luxury, having blown millions on their top-notch survival pad. Some of these homes have built-in moats, sit on top of mountains or on an island, or are converted from underground missile sites. Many are already outfitted with generators, greenhouses and water purification systems for true off-the-grid living, while others may need some work to make them apocalypse-proof.