Seung Sahn International Zen Center Musangsa provides Zen training following the teachings of Zen master Seung Sahn , the first Korean Zen master to teach in the West and the founding teacher of the international Kwan Um School of Zen . Musangsa is located in Gyeryong Mountain in Chungchongnam-do Province in South Korea, an area well known for its strong, mystical energy that has attracted many spiritual practitioners throughout history.