Potential #Mechanics nerd-snipe:
It seems that nobody on the Web has taken a deep approach to answering the eminently important question(s) of:
Are ruined buildings leaning against each other as commonly depicted in post-apocalyptic fiction structurally feasible? Under which construction methods? Etc.
The easier form of the question is to consider only statics, i.e. neglecting impact forces during collapse and just seeing if the actual load-bearing could check out.
I see a lot of *speculation* about this on the Web, but the kind of detail I'm interested in is much more along the lines of Torus Earth:
https://www.aleph.se/andart/archives/2014/02/torusearth.html