I think I actually saw a show on Discovery or one of those networks about companies or millionaires buying these sort of things & using them as a huge wine cellar. Not a bad idea if you have millions of bottles of wine to store, I guess.

"According to the spec, the 57 acre site in Central Washington State, will withstand a one megaton blast within 3,000 feet, has its own private water supply, a constant unheated temperature of 55 degrees Fahrenheit, and has five levels below ground."