Mount Halla is the highest mountain in South Korea, standing at 1,947 meters (6,388 feet) above sea level. Located on Jeju Island, it is a shield volcano and is part of the Hallasan National Park. The mountain features a diverse range of flora and fauna, making it a popular destination for hikers and nature enthusiasts. The summit of Mount Halla offers stunning views of the surrounding landscape, including the Jeju Olle Trail and the coastline. The mountain is also home to a crater lake called Baengnokdam, which adds to its natural beauty. Mount Halla is a UNESCO Biosphere Reserve, highlighting its ecological significance.