Rooftops was a planned multiplayer map in Call of Duty 4: Modern Warfare. All that is known to prove its existence is a file called "compass_map_mp_rooftops.iwi" present in the game's source files. In addition, its name is known because it is referenced in the game's mod tools in the file "mpui.str" in the raw/English/localizedstrings directory.
The map is divided into two sides, both with interconnected buildings with the rooftops accessible. The two sets of buildings are divided by a road, which includes buses and concrete barriers to prevent the player from going out of bounds.