I think Cpt_Oblivious is right, they're pretty much spread across many sections of the world by now. Not that there's anything wrong with that, if done right (meat mustn't be too fatty, garlic sauce needs to be a bit spicy, bread should be freshly baked) they're absolutely delicious. I think here in Germany you can't walk more than 500 metres in any of the major cities without passing at least one stand that sells them. Yum! ^^Armored Prayer said:Well in Turkey we have what is called "Doner Kebabs" which for me is like crack.
The rest of the world needs to try it out.
I can think of quite a few things from my country folks should try, but since I've been living in Northern Germany for a few years now, I'll go with a food speciality from these parts. It's called labskaus, and it's basically a pink goo comprised of fried corned beef, onions and mashed potatoes, served with a sidedish of beetroot, a rollmops, one or two pickles and an egg.

Trust me, it's as delicious as it looks horrifying - and looking at that pic, you know it must be delicious!
http://en.wikipedia.org/wiki/Labskaus