Johnny Cash has been everywhere, and he even sang a song about it (although he was far from the only one). The song lists places, so it was only a matter of time before someone married the song to Google Maps. Iain Mullan did just that. At the site Johnny Cash Has Been EVERYWHERE (Man)! you can listen to the song while the map tracks all the places -and they are far flung, believe me! Meanwhile, the distance between each is tracked on the left side. You can pause and rewind if necessary. The intro says it works best in Chrome or Safari, but I had no trouble with Firefox. -via Metafilter