Hallasan National Park Hallasan National Park Hallasan National Park () is located in the province of Jeju-do, South Korea. It was designated as the 9th national park in 1970. It features the highest mountain in South Korea, the shield volcano Hallasan on Jeju Island. It was designated a UNESCO Biosphere Reserve in 2002, and a World Heritage Site in 2007. Hallasan National Park is managed by Jeju Special Self-Governing Province. It is the only out of 20 national parks that is not managed by the Korea National Park Service. Hallasan has 7 trails: Eorimok Trail (6.8 km), Yeongsil Trail (5.8 km), Seongpanak Trail
Zuidwal volcano their surprise they hit volcanic rock beneath the reservoir rock, which turned out to be an extinct volcano. The gas field went in production in 1988 and is still producing gas. Another clue indicating the presence of the volcano was the temperature. While the usual temperature at that depth is about , they found . The volcano has a height of approximately and a circumference of several kilometers /miles. The volcano was formed about 160 million years ago, during a time of orogenesis on the European continent. The eruptions were short and severe with heavy explosions. This, along with the