which region of the world is peppered with the greatest concentration of undetonated land mines?

Answer 1

The DMZ between North and South Korea is heavily mined. It's the main thing keeping their 1,000,000 strong army from overruning our 30,000 or so troops.

For the person above, there is no Manchurian river in South Korea. Manchuria is part of China.

Answer 2

South Korea, there are plenty on unmarked mine fields in the Manchurian river valley


oh yeah thats right i meant Enchon or how ever its spelled