The territory of the country is largely mountainous, crossed by three chains: along the east coast are the Taebaek mountains, that is the southern extension of the chain of North Korea, in the central part of the country is the chain of Sobaek mountains (Seoraksan, 1,708 metres), while to the south rises the Jirisan chain (Cheonhwangbong, 1,915 meters). South Korea presents some flat areas along the west coast and in the valleys of the rivers, the most important lowlands are the Han River valley, where is Seoul, the coastal plain of Byeongtaek, south-west of the capital, the Geum and Nakdong rivers plains and the Yeongsan and Honam planis in the south-west. The Nakdong river (521 km) is the longest in the country. South Korea has one of the most flourishing economies in the Far East, at the base of South Korean economy is the industrial sector, the South Korean industry is in fourth place in Asia after the Japanese, Chinese and Indian, are particularly developed the industries of food, engineering (automobiles), electronic, chemical, petrochemical, textile, steel and shipbuilding. Develop are also agriculture (rice, barley, soybeans, corn, millet, wheat, soybeans, potatoes, tobacco, cotton, ginseng), forestry, farming (cattle, pigs, bachicultura), and of great importance is fishery. The subsoil resources include coal, nickel, graphite, tungsten, gold, silver, iron ores and copper.