For many Koreans, Jeju has long been the ideal place to spend their summer vacation or honeymoon. Tourism is the No.1 industry in the region and there are very good reasons for it. UNESCO has listed Jeju Island and its lava tubes as a World Natural Heritage. Various rare creatures still inhabit the tubes and tourists can experience what time can do to nature - odd-looking stalactites and pristine water.
Mt. Halla is the highest mountain in South Korea and was also created through volcanic activity. It is classified as dormant and thrills hundreds of hikers. The eruption of Mt. Halla that took place approximately 25 thousand years ago created the Crater Lake, Baekrokdam, at the summit of the mountain. Mt. Halla rises at the center of Jeju Island, 1,950 m 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.
Seongsan Inchulbong proves that Jeju was once an active volcanic area.
Geomun Oreum lava tubes bring fresh air to people who think Korea is over developed,
as do original virgin forests from the Cenozoic Era.