Tags: Castle.
Geumjeongsanseong (literally Geungjeong Mountain Fortress or Geumjeong Fortress) is the largest mountain fortress in the Republic of Korea today. It is located on Geumjeongsan in the Busan Metropolitan City.Following the Japanese invasion of 1592 and the Manchu invasion in 1627 and again in 1637 awareness of the necessity of national defence was heightened especially against attacks from the sea.