Incheon City, is one of the South Korea's third largest metropoltant city, after Seoul and Busan. As the largest seaport on the west coast and home to the country's largest airport, Incheon International Airport, Incheon has become one of the South Korea's most important transport hub.
In the 21st century, Incheon has transformed into a global business den centered around the high-technology and futuristic Songdo International City, which is home to South Korea's tallest building, the 305m supertall Northeast Asia Trade Tower.
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Incheon is regarded as part of the greater Seoul metropolitan area due to part of it bordering the capital, and the fact that the Seoul Metropolitan Subway and the Incheon Subway systems are linked. Incheon is, however, a major city in its own right and is a separate jurisdiction from Seoul.