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Q&A What material could be used for walls on giant futuristic cities?

In the dystopic/post-apocalyptic world I'm building, civilization has been split into two different societies. One is the rich who live in very large, protected cities that have giant walls surroun...

3 answers  ·  posted 7y ago by Sydney Gish‭  ·  last activity 7y ago by Sydney Gish‭

Question reality-check architecture