Yes, Mexico, the Libertarian paradise. Why do I say this? It has everything a Libertarian pines for - a limited weak government, a weak police force, a weak military, and very little intervention in the economy. There are few inheritance taxes and few taxes in general, which is why a few families have ended up owning most of the economy and why the roads are so crappy.
The bottom line is, Libertarianism is just a fantasy - an unworkable fantasy, as the experience in Mexico illustrates. Such a government or economy would quickly devolve into survival of the fittest, with the most ruthless and violent coming out on top. You would have to hope to be lucky to be born into the right family or the right clan.
But that is the appealing part to Libertarians, I guess, as most of them are utter losers in our economic system. They cannot compete on the merits, so they want a leg up by dint of their heritage, race, or whatever. They want a system that rewards those without talent, and punishes those who actually work hard to succeed. The Libertarian fantasy benefits only the man behind the gun, who can force others to do his bidding. It doesn't help the person who actually works and produces and creates.
We don't need to turn the United States of America into the United States of Mexico, thank you.