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 Zuidwal volcano The Zuidwal volcano is an extinct volcano in the Netherlands at more than below ground under the Wadden Sea, between Harlingen and Vlieland, just south west of the island Griend. The volcano was last active during the late Jurassic, (about 160 - 148 Ma ago) and has since been covered by about of sedimentary rock, most of it shale and sandstone from the Cretaceous. The volcano was discovered in 1970 when the French oil company Elf Aquitaine was doing test drills in the Wadden Sea, hoping to find a gas field that a seismic survey had indicated. To