Bukhansan (Korean: 북한산, lit. 'North Han Mountain'), or Bukhan Mountain, is a mountain on the northern periphery of Seoul, South Korea. There are three major peaks, Baegundae 836.5 meters (2,744 ft), Insubong 810.5 meters (2,659 ft), Mangyeongdae 787.0 meters (2,582.0 ft). Because of its height and the fact that it borders a considerable portion of the city, Bukhansan is a major landmark visible from most city districts. The name "Bukhansan" means "mountain north of Han River", referring to the fact that it is the northern border of the city. During the Joseon era, the peaks marked the extreme northern boundary of Seoul.