This is amazing, thanks OP! Reminds me of those cool music maps that I saw on the internet a few years back.
Map of Metal & Map of Electronic Music
Update Wow, thanks for the Reddit Gold! This is my first time getting it, and now I feel like the bees knees!
There is no need to start following hyperlinks or using a HTTP spider for something like that - Wikipedia dumps their database content as SQL at regular intervals. My guess is that you can get the interwiki links dump from their download page for 2019-01-01, and use that as your data set for exploring how articles are connected.
See WikiGalaxy for a similar project, and the curated list on "See also" which keeps track of different visualizations of Wikipedia data.