evidence: The Demilitarized Zone (DMZ) was established in 1953 as part of the Korean Armistice Agreement between the United Nations, North Korea, and China to end the Korean War. It’s in essence a line in the sand that extends the entire 160 mile width of the Korean peninsula, and at one point is just around 50 miles from the Olympic village in PyeongChang. [...] TIME went to the eastern end of the DMZ, which stops at the Sea of Japan — known in Korea as the East Sea — for a look at some of the most remote portions of the 160 mile demarcation line. Barbed wire fencing marks the entire two-mile-wide DMZ, and on either side of the no-fight zone, mines pepper the barren landscape and watch stations for patrolling soldiers rise along its entire length. [...] Despite such ominous reminders, the DMZ has become, like any must-see destination around the world, a big business. At this eastern end of the DMZ in Goseong, government officials are busy constructing a massive observatory tower scheduled to open this summer, to replace the small building built by the South Korean army in 1983 from which visitors currently view the last section of border fence dividing the two nations. Enterprising entrepreneurs also sell jewelry, as well as liquor, stamps and souvenirs from North Korea.