Oh wow. In 995 nodes from Wikipedia categories I made in the 8/21/2021 copy of my big graph… i never did Borders. For all the stuff on boundaries and edges, never did it enter into the geopolitical border realm and it never occurred to me to go there.
I’m having a VERY hard time finding ANYTHING in “category:borders’ that is interesting.
I did find a page on Obstacle. Anything else?