This is Again the Red Team spawn, check out the grassy knowl and the garage, over at the end of the garage is the conncting room between red and green spawns
This is the Green Team spawn check out the expanded parking lot and the steps up to the office that is in Airport 2 in Xbox.
Here's a good one, check out the ladder which leads to a catwalk where you can shoot through the windows in the upstairs part of the Interior airport, straight down the stairs. There is also a whole other building there too.