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JEJU, the largest island in South Korea, came into existence 700 to 1,200 thousand years ago when lava spewed from a sub-sea volcano and surfaced above the waters. Then 100 to 300 thousand years ago, another volcanic eruption formed Mt. HALLA. The final volcanic eruption that took place approximately 25 thousand years ago created the crater lake BAEKROK-DAM, at the summit of the mountain. Mt. HALLA rises in the center of JEJU to 1950m above sea level. The rest of the island slopes down from its summit and is covered with dark gray volcanic rocks and volcanic ash soil. Relatively isolated from the rest of the world, the island's nature has been well preserved in its prehistoric state. That is why traveling to JEJU is to travel back in time.
The value of JEJU was proved as the island received as the island was designated Biosphere Reserve in 2002, World Natural Heritage in 2007 and Global Geopark in 2010, making the sub-tropical island only place on Earth to receive all three UNESCO designations in natural sciences. JEJU has now become a 'treasure island of environmental assets' that the world has to preserve.
JEJU Island is located at the center of northeast Asia, on the path connecting Asia and the Pacific Ocean. The status of a Free International City allows visitors from 180 countries to enter the island without a visa and provides a no-tax privilege.