With this, I refer to cities or regions that could be better than they are, for any reasons you may think of. I have Asturias, Spain in mind: metropolitan area of 800,000 inhabitants with good transportation, superb food and landscapes, nice weather (taking into account how climate change is turning out)… but an extremely old and declining population due to overreliance in public industries. It is a nice place but I think it could be much much better.