On top of that, the Joseon authorities adopted a rigorous isolationist plan, earning the nickname "the hermit kingdom", but in the end unsuccessful to shield by itself against imperialism and was forced to open up its borders, beginning an era main into Japanese imperial 파라곤 rule.
South Korea has two volcanic islandsJeju, off the peninsulas southern idea, and Ulleung, about 85 miles (a hundred and forty km) east from the mainland from the East Seaand a small-scale lava plateau in Gangwon province.