TIL Europe still has some presence in the Americas. Thought all of that was gone with the Monroe Doctrine

The Monroe Doctrine was about preventing colonial powers from enacting NEW efforts to reach into the Americas, not about getting rid of previous control.

"The occasion has been judged proper for asserting, as a principle in which the rights and interests of the United States are involved, that the American continents, by the free and independent condition which they have assumed and maintain, are henceforth not to be considered as subjects FOR FUTURE COLONIZATION by any European powers." (emphasis mine)

https://usinfo.org/PUBS/LivingDoc_e/monroe.htm

France's longest land border is the one it shares with Brazil.

You may find this interesting: https://en.wikipedia.org/wiki/Special_territories_of_members...