What is your favorite setting in any fictional media? Games, books, movies, etc. What do you like about it?

I really like the world of Horizon zero dawn and forbidden west. All the ruins from buildings we can recognize (and some we cannot) are really cool. I also like how humanity had to start again without all the knowledge that was lost in the Apollo purge and how they had to adapt to a world shaped by the AI called Gaia and her robots.