I saw some other videos like that. The underground cities and inhabitants. They said it had everything, from McDonald's to "religious sanctums" In this video you can see more about them, and suddenly it makes more sense.
Would you be able to find that video again? I'm interested to see how it looks like when it's lived in.
https://www.youtube.com/watch?v=b1YDufouqbY
please excuse jewtube link. The one that I was thinking of was more "subterranean base" I still remember it because what creeped me out about it was how "would never see the sun" and that stuck with me.
No way could I live like that, or work. I've visited some underground bunkers during my time in military and it was very unnerving and claustrophobic.
Also visited quite a few caves for recreational purposes and spent about 2 hours in one. Completely different story, very comfortable and peaceful places.
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