10. Korean Demilitarized Zone, Republic Of Korea
At the end of the Korean War in 1953, a strip of land running across the Korean Peninsula was established to differentiate between the areas of North and South Korea. Today, this border remains one of the most heavily guarded areas in the world – spanning 250 kilometers long and 4 km wide. While tours to the public are available at the DMZ’s joint security area, the rest of the border is considered extremely dangerous and has seen numerous violent incidents over the years resulting in multiple deaths by shooting or mine explosion. These deaths are typically attributed to soldiers attempting to cross over the border or occur when illegally constructed tunnels across the border are discovered.