63 Building

The 63 Building (Hangul: 63 빌딩 or 육삼 빌딩), officially the Hanhwa 63 City, is a skyscraper on Yeouido island, overlooking the Han River in Seoul, South Korea. It was designed by the American architectural firm Skidmore, Owings & Merrill (SOM). At 249 meters (817 ft) high, it was the tallest building outside North America when it opened in July 1985, and remains the tallest gold-cladded structure in the world. It stood as South Korea's tallest building until the Hyperion Tower surpassed it in 2003, but remained the country's tallest commercial building until the Northeast Asia Trade Tower was topped-out in 2009.