Call of Duty: World at War Easter eggs

Nacht Der Untoten... In Multiplayer?
You know the top floor of the Nazi Zombies map "Nacht Der Untoten" (Night of Undead)? It can be found as the top floor of the south-western building on the Multiplayer map "Airfield." The layout is exactly the same, as the walls and columns are placed and shaped exactly the same, the stairs are where they are in the Zombies map, and the windows also resemble the map.