User blog comment:IDLift3000/Guess The Country.../@comment-2047157-20120817005835/@comment-1915803-20120817184231

It's the Vatican City, I'm pretty sure, but Xydux already got it.

Honestly, not to burst everyones' bubbles here, but a country-guessing contest is very easy usually (especially in Schindler's case in which he told us exact population figures, etc.). The statistics can be looked up in a flash. And Doc's clue of not being in the UN left only the options of Taiwan, Kosovo, or the Vatican City.

I suggest further contests should be a "guess the city" contest like this one. Assuming you don't give away too many hints, these require more research and brainpower to contemplate.