What's the Furthest You Could Travel Without a Passport?

As an American with an expired passport, I guessed that I couldn't go anywhere outside the U.S. I was wrong! But even more surprising, this video from Half as Interesting isn't just about Americans. If you are French, you could technically go halfway around the world and land on an island without a passport -if there were a practical way to get there without going to another country first. And there are other geographical quirks to learn about here. (via Digg)