The uber-wealthy tend to prefer this strategem, since it allows them to keep their shelter close to home without requiring travel during a time when, presumably, multiple nations are trying to wipe out everything that walks or crawls.
1
The combination of physical isolation, neutrality on the governmental stage, and an inhospitable climate make it a tremendous place to stay safe from nuclear issues.
2
Bearing no nuclear arms themselves, having almost no military, lots of space to spread out, and being far from everywhere except Australia, this even has a warm, enjoyable climate to spend your end of days in comfort.
3
It’s a nice land, but backwards and isolated, with few resources and no threat to anyone.
4
You’re going to need to pack enough supplies, because you aren’t living off that land, and you’d better pray the nuclear apocalypse happens during summer in the southern hemisphere.
5
More than 400 islands, French Polynesia is too scattered to really warrant an attack, and far enough from any shore that the water should sink nuclear fallout before it drifts in on the tradewinds.
6
Perth is place away from anything else, so should someone get trigger happy and start hitting anything that looks viable, it’s deep under the radar.
7
Though Apartheid may have caused many to stir against South Africa, the nation doesn’t otherwise bear many international political problems, has solid infrastructure from English occupation, and isn’t a threat to anyone.
8