World's 5 Most Dangerous Borders - as part of the travel series by GeoBeats.

Here are the world's 5 most dangerous borders.

Number 5 - The Demilitarized Zone between North Korea and South Korea is one of the scariest places on Earth. At nearly 150 miles long and 2.5 miles wide and home to 2 million armed troops, it is the world's most heavily militarized border. Since the 50s, the DMZ has been the site of many incidents including the 1976 one in which North Koreans used axes to kill two US officers while they were cutting a tree.

Number 4 is Pakistan and Afghanistan. With dramatically increased violence in Pakistan and Afghanistan, the tension has continued to rise between the two nations. Both accuse each other for not doing enough to control the insurgent activities across the porous borders which lie along the lawless tribal areas. According to a BBC report, an Afghan official claimed that recently, there have been over 3,000 cross border attacks over a period of 3 months.

Number 3 is Sudan and Chad. Years of conflict has resulted in the border between those countries being extremely volatile. Although in the recent past both countries have created joint forces to control the situation, even today numerous crimes take place including rape, killings, and recruitment of child soldiers.

Number 2 - China and North Korea share close to 900 miles of border. Due to the tough economic conditions, thousands of North Korean refugees have tried to cross the porous border between the two countries. However, if caught, these North Korean refugees are tortured and forcibly sent back. They are likely to face imprisonment and even execution.

Number 1 is India and Pakistan. Since their partition in 1947, these countries have always seemed on the brink of war. After 3 full-scaled wars in the last 65 years, the borders of these 2 nuclear powers are among the most volatile in the world. Daily artillery fires are not unheard of across various border points.