A doomsday prepper has revealed what it is really like ... They soon traded in their car for a truck to tow their trailer and travelled with Zani's son, 11, until they found the perfect location.

Narrator: Doomsday prepping isn't a new idea. In the '50s and '60s, houses were built with bunkers, and shelters started popping up during the Cold War. Today's preppers have plenty of survival ...

Given the kind of money involved, the people building these shelters aren't your ordinary doomsday preppers ... you can reach an enormous vehicle garage, a phone booth that lets you disappear ...

It is a far cry from the off-grid homesteads and stark nuclear shelters favored by traditional doomsday preppers—some of whom have earned viral stardom by showcasing the many ways in which they ...

The "preppers" had a variety of reasons for their doomsday stashes ... them contained this rifle that apparently could take out a car, you know, destroy its engine with one shot," Mills said.

New York City firefighter Jason Charles is a "prepper," someone who spends large amounts of time preparing and planning to survive an eventual apocalypse. When Charles isn't on camping trips to ...