The 5,525-mile Slash...
The US-Canadian border along the 49th parallel is the longest national border in the world at 5,525 miles. You'd think such a l... ...the world at 5,525 miles. You'd think such a long border would be fairly invisible, especially since it ru... ...n: a person on either side...
https://www.neatorama.com/2018/01/22/The-5525-mile-Slash/
