Cost: $50,000 for a basic shelter, up to millions of dollars
This high-end twist on the age-old bomb shelter is called an NBC shelter; it protects against nuclear, biological and chemical attacks. It is 20 feet underground and has a bullet- and bomb-proof door.
It also has everything the ultra-wealthy need to survive for at least three months, including food, water and “good air,” according to Corbi. This particular shelter is even stocked with champagne.
If residents want to venture outside during a disaster, they can use the gas masks, NBC suits and supply-filled backpacks stored in the shelter.
Next: Not just a panic room -- a full "safe core."