After the Korean War, South Korea and North Korea established a border that cut the Korean peninsula roughly in half.
Stretching for 2 km on either side of this contended border is the Demilitarized Zone (DMZ). One of the last relics of the Cold War, the DMZ attracts a great deal of public interest, and is a must-see for travelers visiting Korea. From the Dora Observatory, you can even have the chance to look across the border, into one of the most mysterious countries on earth.
Feel the palpable tension between these two nations, and be a part of modern military history.