Busan Metropolitan City, also commonly referred to as Pusan, is the largest harbor city in South Korea. With a population of about 3.65 million, Busan is also South Korea's second largest metropolis, after Seoul. The densely populated city is situated in the narrow Nakdong River valley, with mountains separating some of the various districts.
Busan was the host city of the 2002 Asian Games and APEC 2005. It was also one of the host cities for the 2002 FIFA World Cup. Administratively, it is designated as a Metropolitan City. On November 14, 2005, the city officially announced its bid to host the 2020 Summer Olympics Games.