Because every little kid loves building a fort out of couch cushions and sheets (I know, not “every” kid, but bear with me) there is a great market for grown ups who want a fort too. Enter 20th Century Castles, a real easte company specializing in decommissioned missile bases.
How cool would it be to have a house with thousands of square feet of underground space? You thought the basement was cool when you were a kid? You need a house that's almost all basement.
Not to mention, this will be a great place to live when the whole world goes to hell because we're doomed as a race and...
Oops, there I go again.