PassportStamp - the site where you can create your personalized travel maps and see who has visited each of the world's countries
I'll start: Baarle-Nassau in the Netherlands / Belgium (more details here).
Märket, Aland Islands/Sweden, (see here)
Llivia, a Spanish village completely in France.
Märket, Aland
Märket, Aland Islands/Sweden, (see here)
LLIVIA
Llivia, a Spanish village completely in France.