The Greatest Website of the World

If the Internet would be disbanded and shut down completely tomorrow and you were only allowed to keep one functioning website, which one would you take?

Do not tell me your homepage, Google or Digg, I mean a website that works on its own without depending on other sites and that does not belong to you…

Please do not post just a URL, explain also why this particular website is the greatest!

I will collect and publish the best replies and everybody taking part will get due credits.

Probably most people will reply Wkipedia…