South Korea (Europe) fact (?) of the day
Busan — the second largest city in South Korea — would also be the second largest city in Western Europe.
That is from the new and interesting paper by Glaeser, Ponzetto, and Zou (pdf), on mega-cities vs. networks. By the way, I consider Busan to be a lovely and underrated city, think of it as the Vancouver of Korea, and on a clear day you can look across the water and see Japan.
Update: See the comments for some challenges to the #2 claim.