South Korea is gaining a higher profile as a travel, culture and culinary destination. Where to travel in South Korea? Seoul and Busan are the best tourist cities you should never miss when travelling in South Korea. Seoul, the capital and largest city of South Korea, is also the political, economic, technological and cultural center of South Korea. Seoul is located in the Han River Basin in northwestern Korea, and in the middle of the Korean Peninsula. Busan, located in the southeast end of South Korea, is the largest port and second largest city in South Korea, and one of the busiest ports in the world.