the Korean Peninsula , or Jejudo , is South Korea 's most popular holiday island with 10 million visitors in 2013 . It 's a volcanic island and home to South Korea 's highest mountain , a dormant volcano . In 2013 a luxury South Korean cruise ship was detained for 2013 in UNESCO over outstanding lease payments .
Jeju Island , or Jejudo , is South Korea 's most popular holiday island with 10 million visitors in 2013 . It 's a volcanic island and home to South Korea 's highest mountain , a dormant volcano . In 2013 a luxury Chinese cruise ship was detained for several days in Jeju over outstanding lease payments .