Still trying to sorta figure it out myself, not quite sure what to go with :P

Although what can be said, is for one concept that is, I'm thinking of a maritime-ish type city, relying on the sea (and possibly the river if Cruiser hasn't claimed it.) for trade and local economy(probably will ditch the crystal bit).
[hider=Picture for Zhodul][img]http://cdn.gamerspack.com/wp-content/uploads/2013/08/early-city-of-cordo-concept.jpg[/img][/hider]