Seoul is South Korea’s capital and largest city. Seoul is home to 9.7 million people. It also forms the center of the Seoul Capital Area, which includes the Incheon metropolis and Gyeonggi provincial.

Seoul is considered a global city. It was rated an Alpha-City in Globalization and World Cities Research Network. In 2014, Seoul was fourth after New York City and Los Angeles. International visitors usually arrive in Seoul via AREX at Incheon International Airport. This airport has been rated as the best for nine consecutive years by Airports Council International (2005-2013). Arcadis was named the most liveable Asian city with the second highest quality of life. Seoul’s GDP per person (PPP) was around $40,000. The cost of living in Seoul was 6th globally in 2017.

Busan, South Korea’s second-most populous city after Seoul, is Busan. The city has more than 3.4million residents. It was once called Pusan. It is the cultural and economic center of southeastern South Korea. It is the busiest port in Korea and sixth in terms of global traffic. Nearby is the “Southeast Economic Zone,” South Korea’s largest industrial area.

Incheon was once known as Jemulpo. However, it became the Incheon metropolitan city in 1910. It is located in the northwestern part of South Korea, bordering Seoul and Gyeonggi.

Daegu can be described as a city in South Korea.

It is Korea’s third-largest urban agglomeration, after Seoul and Busan. It is home to more than 2.5 million people and is the third-largest urban area in Korea. It is located in the Yeongnam region on the southeastern Korean Peninsula and is the second-largest city after Busan. However, according to the “Act on the Establishment of Daegu City and Incheon City”, it is still the third-largest city in Korea. Their combined population is more than 5,000,000.

Songdo International Business District is also known as “ubiquitous”, or smart city. It was built on 600 ha (1.500 Acres) of reclaimed land along Incheon’s waterfront. It is located approximately 30 km (19 mi) southwest of Seoul, South Korea. Incheon Bridge is a bridge linking Incheon International Airport and Songdo International Business District. It is a reinforced concrete highway bridge that spans 12.3 km (7.6 mi).