Via Fast Company comes a link to some infographics over at New Scientist including a map which shows the interconnectedness of the modern world in terms of proximity to urban centers and availability of transportation networks (the actual NS article, which appeared in April ’09, is only available online to magazine subscribers, but you can read a brief summary here)

The picture above is a closeup from their global map and shows what is the remotest place on Earth: Central Tibet. The lack of populated areas or even roads in this region means that if you’re stuck there it’s a three-week walk to the nearest ANYTHING.

According to the Fast Company post (they obviously paid to read the actual article), less than 10% of the Earth’s surface is more than 48 hours’ travel from an urban center (defined as a city with a population of 500,000 or more). Even 80% of the depths of the Amazon rainforest are within two days of a city due to river transportation AND the increasing encroachment of development into the rainforest itself.