Seoul is South Korea’s capital and also its largest city.It is relatively small, with an area of about 600 square kilometres, but having a population of over 10 million makes it is one of the world’s most densely populated cities.It is densely populated not only in terms of people but also in terms of vehicles–about three million of them regularly cause widespread traffic jams. The Seoul National Capital Area–Seoul’s commuter belt–has a populace of over 20 million. Around one-quarter of South Korea’s entire population lives in and around Seoul, which is located in the northwest of the country