As to Jeju Province, the Hallasan Mountain of 1,950m rises high highly on the island central part as the volcanic island of the oval shaped that is 41㎞ with east and west about 73㎞ and north and south. The Jeju Province made of the volcanic activity makes a boast of the volcano topography that is various and unique as much as the whole island can be said to be 'the volcano museum'. 360 Yeo Oreum that it is big on the ground spreads. About 160 lava tunnels are underneath scattered in the whole island with the land. The Oreum shich is abundant in small one in this way and case where there is the cave is very globally rare.
Such value of Jeju has resulted in UNESCO Triple Crown Holder with the designation of Biosphere Reserve in 2002 as the beginning, designation of World Natural Heritage in 2007, and Biosphere Reserve certification in 2010.
This is unprecedented in the world, and Jeju has now become a 'treasure island of environmental asset' wherein the world has to preserve.