Anyang () is a city in Gyeonggi Province, South Korea. With a population of approximately 600,000, it is the 20th largest city in South Korea. It is a satellite city of Seoul and located approximately south of Seoul, and north of Suwon. It is connected to Seoul via the Seoul Subway Line 1 and Line 4. The City motto of Anyang is "Livable city, Proud citizens". City symbols are a grape mascot named 'Podong-i', Forsythia (flower), Ginkgo (tree), and eagles. Geography Anyang is divided into two-halves for administrative purposes: the Manan district to the west and Dongan district to the east. The Manan district is an old and original downtown area centered on Anyang Station. It is dominated by a shopping area with outdoor markets, known as "ilbeonga" (first street). The Dongan district is a new, wealthy suburb of Pyeongchon. The tallest building in Anyang is the Acro Tower, which was completed in April 2007. It is a twin-tower office building in the Dongan district, across the street from Anyang City Hall. Anyang is a convenient transportation center between Seoul and other major cities across the country. Anyang spans . Forest and fields constitute , urban development constitutes , dry fields constitute , rice paddies constitutes , and other land use constitutes . Anyang is surrounded by mountains on all four sides. These mountains are Gwanak Mountain and Samsung Mountain to the north, Suri Mountain to the southwest, and Cheongye Mountain and Morak Mountain to the other sides. There are eight streams and rivers in Anyang, with a length of . The main river is Anyang River (one of the four main tributaries of the Han River in Seoul), which is long. It has a basin area of , fed by 21 tributaries. The center of the overall elliptical basin topography is low and flat. The river runs through the center of Anyang city and is a common place for people to walk, jog, or ride bikes. The river flows through seven cities in Gyeonggi Province. This, however, has caused major issues with pollution. River banks are often covered with parking lots or athletic fields, combined with poor sewerage systems in the upper reaches of the river. As a result, the Anyang Stream Watershed Management Committee for Water Quality Improvement had been established to address some of these issues. Between 1974 and 1977, Samduck paper and Samyoung hardboard factories poured