Stay near your borders! by KlionskyG

Question 11

The historic homes of Thomas Jefferson (the 3rd president) and James Madison (4th) fall on either side of the 38th north parallel in Virginia.

But the term "38th parallel" is more frequently used as shorthand for the division between a different pair of neighbors - neighboring countries.

Which of these two countries has only one land border (hint: it borders the other one)?

South Korea