Okay, survivalists. See them here.
But the basic list is (and note that northern Thailand is gets first mention :D):
Chiang Mai, Thailand
Tristan da Cunha, in the South Atlantic
Guam
Denver, Colorado
Bern, Switzerland
Puncak Jaya, Indonesia (a bonus feature is that it contains the largest gold mine in the world)
Cape Town, South Africa
Necker Island, part of the Hawaiian Island chain
Rio de Janeiro, Brazil
Kansas City
Tierra del Fuego, Chile
The Canadian Yukon
… Kansas City? Really? I mean sure, you can survive the zombpocalypse there, but would you want to keep on livin? 
I have a hankering for New Zealand or Tasmania, myself.
I know exactly where I’ll be going - Ilocos Norte, on the very northern tip of the Phillipine Islands. A rural province that’s totally remote, with beautiful beaches, and my girlfriend’s family owns gas stations and a tobacco company there. I would be totally set. Fresh fish and roast suckling pig every day. Fuck, I don’t know why we’re not there now.
Chiang Mai would of course be the closest for me to get to, and it is a nice city. I used to live in the next province over, Mae Hong Son. The whole area is nice and elevated, which could help against rising sea levels.
In the event of some sort of near-complete apocalypse in which surviving locals would push out the foreigners, I’d probably make my way to Denver on that list. Especially in the event of an environmental catastrophe that swallowed up Guam or Necker Island.
How would going to another country (presumably then jampacked with refugees) help me in this vaguely described crisis situation?
No internet access?
According to things I’ve heard, they got some pretty little women there. Come the apocalypse, I’m gonna get me one.
I’m heading here when the zombies and aliens attack.
SubTropolis is a 55,000,000 square foot (5,060,000 m³), 1,100-acre (4.5 km2) manmade cave in the bluffs above the Missouri River in Kansas City, Missouri, United States that is claimed to be the world’s largest underground storage facility.
“Ev’rythin’s up to date in Kansas City.
They’ve gone about as fur as they c’n go!
They got a big theayter they call a burleekew.
Fer fifty cents you c’n see a dandy show.
One of the gals was fat and pink and pretty,
As round above as she was round below.
I could swear that she was padded from her shoulder to her heel,
But later in the second act, when she began to peel,
She proved that ev’rythin’ she had was absolutely real~
She went about as fur as she could go!”
… why isn’t Madagascar on the list?
The first rule of planning a post-apocalyptic hideout is that you don’t talk about the post-apocalyptic hideout.
I ask myself the same question. Rio would be the obvious choice for me (just left there two days ago, in fact), but I don’t see why Rio—which today barely manages a shaky stasis between the “haves” and millions of people who are essentially refugees in their own country—is going to be preferable to a carbon monoxide nap when boat- and planeloads of desperate interlopers decide to crash Carnaval.
The only questionable one on the list for me is Necker Island. What, just because Richard Branson owns it?? And if we’re talking about climate catastrophe that raises the sea level, a lot of good that will do.
At the first sign of trouble, they shut down all of their ports.
Yay, I’m already in Denver, so no moving required! Email me your pitiful pleas about why I should put you up at my place when the excrement hits the moving air device, and I’ll pick and choose among you.
I’m guessing that the Falklands would be a good place to chill-isolated from the mainland, small population, abundant local food supply. Patagonia might be a close second-isolated, and unlikely to e visited by zombies, vampires, or aliens.
Tierra del Fuego is actually and island that belongs both to Chile and Argentina. The photograph, if I am not mistaken, is a of Usuahia the capital of Tierra del Fuego (an argentinian state).