Modern Warfare 3 just released a new DLC drop. One of the maps, Foundation takes place in a cement factory. A fairly small map in overall area, Foundation contains plenty of tall structures and towers to make up for it.
If your style is more towards waiting and sniping, you’ll love this map. Otherwise, you’ll MF the map everytime it pops up in the corner between rounds. The drops seem to really push the assault rifles, which I like, but some may hate.