Also, the Joseon authorities adopted a rigorous isolationist policy, earning the nickname "the hermit kingdom", but eventually unsuccessful to protect by itself from imperialism and was forced to open its borders, starting an period top into Japanese imperial rule.
The southern and western portions of the peninsula have effectively-designed plains, whilst the jap and northern pieces are mountainous. The highest mountain in Korea is Mount Paektu (two,744 m), by which operates the border with China. The southern extension of Mount Paektu is often a highland identified as Gaema Heights. This highland was primarily elevated throughout the Cenozoic orogeny and partly protected by volcanic matter. Into the south of Gaema Gowon, successive high mountains can be found along the eastern Coastline 토토 of the peninsula.