Also, the Joseon authorities adopted a rigorous isolationist policy, earning the nickname "the hermit kingdom", but eventually unsuccessful to protect by itself versus imperialism and was forced to open its borders, commencing an era primary into Japanese imperial rule.
The southern and western areas of the peninsula have very well-made plains, while the eastern and northern components are mountainous. The highest mountain in Korea is Mount Paektu (2,744 m), through which runs the border with China. The southern extension of Mount Paektu can be a highland 슬롯솔루션 identified as Gaema Heights. This highland was predominantly lifted throughout the Cenozoic orogeny and partly covered by volcanic matter. Towards the south of Gaema Gowon, successive higher mountains are located along the eastern coast from the peninsula.