I played it a long, long time ago, so I don't really remember the places, but there was this one building, in a winter setting, where one team started outside, another inside. Best I can remember, it was a few years ago.
America's Army is a great game, a lot of people discredit it though because of not having mass respawn (like halo 3, GOW, COD, etc.) This game is the epitome of teamwork and strategy.
My favorite map on AA is either SF Hospital, or Bridge Crossing.