Mok-dong is a dong, neighbourhood of Yangcheon-gu in Seoul, South Korea. It places in the northeast Yangcheon-gu, and has Sinjeong-dong on south, Gangseo-guYeomchang-dong on northwest, and Yeongdeungpo-guYangpyeong-dong on east. It is famous for its education and good schools. For this reason, it is home to many upper-class people. Many broadcasting stations are clustered in here, including CBS, and SBS. It is also famous for the baseball stadium for Nexen Heroes. The region was usually used for raising horses in Joseon Dynasty, before it was developed by government in 1980s to provide housing for increasing population of Seoul. The name Mok means tree, probably named due to abundance of trees in the region. The land is flat and low, and was flooded frequently by the nearby Ahn Yang Chun; the dam was later built to prevent further flooding. Mok-dong also suffered migration over the garbage incineration plant located in Mok-6dong due to the plant's over-emitted dioxine in late 90s.
Mok-Dong is home to the Hyperion Towers, a group of three buildings completed in 2003. The tallest of which, Tower A, is 69 storeys and 256 metres (840 feet) high, making it the second tallest building in Seoul and one of the tallest residential buildings in the world.