what is south korea's capital city?
Seoul
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 Seoul is the capital city of South Korea , which is roughly bisected into northern and southern halves by the Han River . Seoul is also located at 35 mi ( 56 km ) south of the 38th parallel . The battle was fought over the UN defenses at the 38th parallel , which stretches horizontally from the Imjin River mouth on the Korean west coast to the town of Chuncheon in central Korea . A road dubbed " Route 33 " runs south across the 38th parallel at the Hantan River , passes through Uijeongbu and eventually arrives at Seoul , and it is an ancient invasion route towards Seoul . Another road ran across the Imjin River , and it connects Seoul and Kaesong through the town of Munsan and Koyang . Finally , a road runs through Chuncheon and it connects to Seoul from the northeast . The harsh Korean winter , with temperatures as low as − 20 ° C ( − 4 ° F ) , had frozen the Imjin and the Hantan River over most of the river crossings , and it eliminated a major obstacle for the attacking Chinese forces . 

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 Seoul , officially the Seoul Special City , is the capital and largest metropolis of South Korea . A megacity with a population of over 10 million , it is the largest city proper in the OECD developed world . The Seoul National Capital Area is the world 's second largest metropolitan area with over 25 million inhabitants , which includes the surrounding Incheon metropolis and Gyeonggi province . Almost a quarter of South Koreans live in Seoul , half of South Koreans live in the metropolitan area , along with over 275 @,@ 000 international residents . 

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 Seoul , officially the Seoul Special City , is the capital and largest metropolis of South Korea . A megacity with a population of over 10 million , it is the largest city proper in the OECD developed world . The Seoul National Capital Area is the world 's second largest metropolitan area with over 25 million inhabitants , which includes the surrounding Incheon metropolis and Gyeonggi province . Almost a quarter of South Koreans live in Seoul , half of South Koreans live in the metropolitan area , along with over 275 @,@ 000 international residents . 

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 Seoul , South Korea 

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 Located on the Han River , Seoul has been a major settlement for over 2 @,@ 000 years , with its foundation dating back to 18 B.C. when Baekje , one of the Three Kingdoms of Korea , established its capital in what is now south @-@ east Seoul . It continued as the capital of Korea during the Joseon Dynasty and the Korean Empire . The Seoul National Capital Area is home to four UNESCO World Heritage Sites : Changdeokgung , Hwaseong Fortress , Jongmyo Shrine and the Royal Tombs of the Joseon Dynasty . 
