Quote Originally Posted by Hasrat View Post
Seems to me the greater challenge would be creating surrounding areas of similar interest. Given everything we know and interactions to date, seems reasonable to expect any such city to be largely self sustaining, so I can't imagine much in the way of wide avenues and tunnels branching out (except maybe to some degree for inter-city transport?).
I actually think there's a ton of potential with an underdark type setting, some even foreshadowed a bit! Substitute plants with insane fungus/mushroom/etc. forests (I remember reading that Duskwight cuisines uses mushrooms a lot IIRC?), use fauna that has insane lack of pigment and/or eyes similar to cave fish, geode aesthetics, bioluminescent lighting potentially for rule of fantasy, underground lakes and rivers, volcanic activity, could go on! And architecturally could do so much with intricate stonework and building cities into the surrounding caverns. Maybe since there's similar French influence could draw from Rococo vibes or something. Fun juxtaposition between the darkness and spookiness of caves and something very delicate and beautiful.

I'm sure there are folks who wouldn't be interested in this kind of take, but idk I'd love to see something that really experimented and pushed the concept.

Also Hell's Lid is technically subterranean area precedent, so logistically would be doable in Eorzea.