Well when I can, I'm going to make a ZM map recreating a place from a game, so you could try thinking through films games etc for some ideas, don't have to be necessarily exact copies, just ideas, also be careful if you do try this with credits, authors and copyrights.

Good idea about recreating a place. and that call of duty 4 screenshot looks god for a zm map

Something derelict. Populated zm maps look r'tarded