This map supposedly reflects where spam comes from
). But, unless GPSs embedded into domain name servers are faulty, I would say spammers are pretty good at forging their original location... or else they are outsourcing to weird places.
For instance, check the peninsula of Korea: it's red-hot with spam. Problem is, it's the whole
peninsula, North and South Korea; which probably means that the only person known to surf the Internet in North Korea, The Fearless Leader Kim, sends, all by himself, as much spam as all the broadband-to-kill South. It even spills over to China, and, from what little I know of China, that part of the country is not exactly known for its telco infrastructure.
But let's go to Europe. Small purple spot around Moscow, but a big red spot in the seriously buttoned-up Germany, Switzerland, Liechtenstein and Austria. I might have received some spam from Germany (notoriously using the gmx.net domain), but never ever received anything from Switzerland (or Austria, or Liechtenstein, for that matter).
There's a little bit also in Spain, of course; Madrid (but not Barcelona?), extending into the castillian provinces, Murcia and north-easth Andalucia: Jaén! Where I come from! Hey, guys, stop it, will you! No more "Olive oil boosts your manhood", will ya?