Seoul is the capital of South Korea and the 35th largest metropolitan city in the world, with a population of 9.9 million people. It is located near the Han River in the northwest of South Korea. Among the popular attractions in Seoul are Nami Island, Namsan Tower, Sejong Museum, Hongdae Street, Itaewon Mosque, Gyeongbokgung Palace, Vivaldi Ski Park, Namdaemun Market, Starfield Library, Dongdaemun Street, Myeongdong Street, Gwanghwamun Square, and Everland Theme Park.