In Hanguk (a word used by South Koreans to refer to their country), most of the 51 million people live in urban areas. After Seoul, the next largest cities include Busan, Incheon, and Daegu. South Korea is one of the most ethnically homogenous countries in the world (as is Japan) with over 99% of the population identifying as Korean. You have likely heard of (or tried) kimchi (fermented vegetables), an extremely popular food in South KoreaFun fact: there are almost 200 kinds! Ready to see what else you may not know? Test your knowledge with our South Korea quiz below!