Today, our houses aren't exactly short of amazing features, but with security more important to homeowners than ever, it's no wonder that private survival shelters are fast becoming property must-haves.

From a rural home in Kansas with a Cold War missile silo in its backyard, to a luxury property in Texas with a fallout shelter hidden behind a bookcase, these residences each come complete with an impenetrable hideaway. Click or scroll on to step inside...