North Korea spent the pandemic building a huge border wall Lots more, including all kinds of photos and maps, at the link. The pics really are worth checking out because, honestly, if someone pitched something similar for the US, only with Trump's face plastered everywhere, a disturbing number of people would die from protein loss due to how much they were fapping themselves over the idea.
Also don't get pesky members of the free press illustrating how easy it is to circumvent your wall design, or asking whether this is a good use of resources when it's choking off one of the sources of necessities that keep your population on this side of starvation.
