South Korea Sojourns V: Hallasan Mountain
Hikers ascend the steps on one of the hiking trails of Hallasan Mountain March 9, 2014, in Jeju Island, Republic of Korea. The mountain is located in Hallasan National Park, and has seven trails of various lengths. Located centrally in Jeju, the height of the mountain offers broad panoramic views of the island. (U.S. Air Force photo by Staff Sgt. Jake Barreiro)