There is one tiny country that lies between France and Spain. The country is called Andorra. Note that France and Spain still share most of their borders with each other, and only a small part of the shared border is interrupted by Andorra.
The Limpopo forms that border between Zimbabwe and South Africa.
Spain and France are the only countries that border Andorra.
The USA has a border with Canada. There is no distance between the two countries, just as there is no distance between the USA and Mexico (which is on our southern border).
France and Italy share a common border. North of Italy and West of France, is located Switzerland, which is divided into cantons.
That point is in France, but only a few miles from the border between France and Belgium.
France - although Andorra lies along that border - between Spain and France - nearly all of the border is with France.
They make the border between France and Spain, and the tiny country of Andorra is in the Pyrenees between France and Spain.
Brittany is part of France and located on its western part, on the Atlantic. It has no border with any foreign country.
Spain is located on the south-west border of France, across the Pyrenees mountain range.