I haven't seen this been suggested yet, but.. HUGE shopping malls. But kinda like Dawn Of The Dead and Dead Rising. Just a competely fully fleshed out shopping mall with absolutely everything. Shops, supermarkets, stock rooms, basements, car parks, food courts, toilets, janitors closest, a control room..? Basically everything. You'd stumble upon the shopping mall in a fairly big city, i imagine it would get fairly popular, but without a doubt, worth the reward and risk, but that's also fun right? Helipad on the roof with several other ways to get inside the shopping mall. I imagine the whole shopping mall would be a deep and very fleshed out place to possibly set up camp, and if enough players, even control the place. It could spring scenarios where you have small groups of players fighting over the mall, but also surviving there. Vents, broken elevators and junk could be used to make this happen. I just for one think Day Z would benefit with added, a 'classic zombie shopping mall in, just as a possibility.