Fun picture of the Internet from CAIDA, which stands for Cooperative Association for Internet Data Analysis. The image does a good job splitting the difference between geographic location (which is displayed as longitude around the edges) and network relationships. For instance, you can see that Europe is closely linked with itself, whereas in Asian countries traffic tend to come all the way to the US before being routed back to another Asian country. Lots of other good net visualization tools on this site, including GTrace, which is a geographic traceroute visualizer. Network visualization is a tough problem.