Built by an army unit in 1983, Goseong Unification Observatory is the nearest place for viewing Geumgangsan Mountain in North Korea, the shortest distance being 16km away and the farthest being around 25km away. From the observatory, you can see Haegeumgang, and the islands nearby, Manmulsang, and Hyeonjongam. On clear days, you can also glimpse various peaks of Geumgangsan Mountain such as Ilchulbong Peak (1,552m), Chaehabong Peak, Jipseonbong Peak, Yukseonbong Peak, Gwaneumbong Peak, and even the greatest peak, Birobong Peak. Goseong Unification Observatory is the closest observatory to the North, and many people who visit are those who had to leave their home and were separated from their families during the Korean War. You can see monuments built in the hope of reunification here.Tongil Security Park, which can be considered the entrance of Unification Observation, was built in 1987 to be used as a national security site. You must pass through a security training here to get to Goseong Unification Observatory.