While your average homeowner would almost certainly feel a little claustrophobic heading down into a subterranean space like this every day (which is actually one of the many underground silos, drains and tanks Ruben has found on his property), the Romeros don't seem to mind it.

"It depends on the bunker," says Ruben. "If you're living in our bunker, chances are you're not going to feel claustrophobic because it's a big space. It's like entering into a movie theatre. Yeah, there's no windows, but it's so wide and open. Now, if you're in a tiny bunker with seven- or eight-foot (2m) ceilings, probably more people would feel claustrophobic. But these AT&T bunkers are massive, so most people feel perfectly fine being in them."

The American family of six living in a $300k bunker