I’ve long been intrigued by “super-bunkers”, made by and for a combination of overly paranoid governments and survivalists with too much money. For the former, I’ve liked Albania’s mess of bunkers to the point where I made my very first Command scenario centered around that country. For the latter, well, it’s bemusing to look at the entries of bitter rival (to put it mildly) bunker-builders Atlas Survival and Rising S .
Bunkers range from the small, legitimately practical and affordable to the over-the-top. On one end are essentially beefed-up storm shelters. On the other is Rising S’ “The Aristocrat”, which boasts a swimming pool and bowling alley (!).

The practicality of these, especially for private citizens, has unsurprisingly been called into question. There’s the expense (especially for upkeep) and the challenge of getting to the bunker, since even the advanced ones are hard to live in full time. This happened even to John Rourke, who was caught far away from his “Retreat” and had to fight his way to it in the first arc.
Granted, making a bunker on property one already owns is different from the whole Mel Tappan “countryside retreat” that one mysteriously has time to get to before “it” happens.