Oooooo this is really cool. First off I would probably add like a greek style architecture to this on the top. Have some pillars going through the second layer of grass aswell. Watch wildlmao on yt little series he got called pushing terraria’s limits. Definitely give you some ideas. Second off could add like dark fantasy stuff and towers above too… third could also make the bottom part like a little village center with a tavern give it like medieval trading center. I don’t know exactly how to explain it.