Every time I see Grady Hilhouse drop a new Practical Engineering video, that's an instant click. Ever since I first saw a functioning model of a civil water system on "Mister Rogers Neighborhood" as a kid, I've been fascinated with the built environment. Civil infrastructure is what makes all this (waves arms) work.
https://nebula.tv/videos/practical-engineering-so-you-want-to-build-a-tunnel

