Mungyeong Saejae is a mountain pass in central South Korea. It lies on Joryeong Mountain between the main peak (1017 m) and Sinseon Peak (967 m). The pass itself rises to 642 metres (2,106 ft) above sea level. Mungyeong Saejae connects Mungyeong City, North Gyeongsang province with Goesan County in North Chungcheong province. Water flowing down from the Mungyeong side of the pass eventually flows into the Nakdong River and meets the Sea of Japan (East Sea) at Busan. Runoff from the Goesan side eventually flows into the Han River, which passes through Seoul to meet the Yellow Sea at Incheon.
Source : Wikipedia