We added another country to our list while visiting Croatia: Bosnia
The only road from our port in Dubrovnik to our destination in Split passes through a tiny sliver of Bosnia bisecting Croatia jutting to the Adriatic Sea. When our bus stopped there briefly, we stepped out and touched Bosnian soil, satisfying our rule that we must touch the soil to say we’ve visited a place. How this border oddity came to be, I do not know, but I suspect there’s a story.
Take a look at the long regular border between the US and Canada. Note the odd appendage of northernmost Minnesota, separated by water from the rest of the state but within the US border. There’s a story there about control of the presumed Mississippi headwaters. Let me know if you hear the story about the oddly configured Croatia / Bosnia border.