What's the Most Isolated City in the World?

Tristan de Cunha is the most isolated community in the world. It has fewer then 300 residents, and they were mostly born there. But which city is the most isolated in the world? Living in an isolated city means a high cost of living, since supplies have to be shipped in. And going anywhere would mean taking a plane. To find the answer, first you have to define "isolated" and "city." For this video from Half As Interesting, "city" is eventually defined as any place with more than 100,000 people, which is a low bar to clear. "Isolated" means the furthest from another "city" of 100,00 or more people. When you find out which city it is, you will know why so many people want to live there. (via Digg)