The Russian team spawns in an open area near a parked GermanOpel Blitz Truck, while the Germans spawn in an alleyway by a small tented area and a Flak 88 artillery piece. There are two buildings that players can enter on this map while the rest are closed off. (In the Call of Duty 2 version, there are other buildings the player can enter.) One, known as the "Police HQ" or just "Police Building" is a two story building that the majority of the fighting on this map is centered around. There are three ways into this building and two way to get upstairs, making for some interesting close quarters fighting. Directly across from the Police Building is the Garage, which features an upstairs and a downstairs area filled with crates. This does supply some overhead cover; however, artillery is effective even if the player is underneath. The rest of the map is made up of many tight alleyways and courtyards filled with supply crates. Most of the fighting in this map is close quarters as teams fight over superiority in the buildings to gain a stronghold. Both the flak guns are the objectives for team-based play on this map.
Harbor is renamed to Rostov, Russia in Call of Duty 2. This is odd because the map was based on a mission in Warsaw, Poland.
Harbor is one of the fan favorites for bolt-action rifle matches, the other being Pavlov. This is odd as Harbor is such a close-quarters style map.
There is a method of getting outside of the map, by sprint-jumping over a fence near the German team's spawn point. This allows players to run around on top of the water outside the map which can be quite comical.
There is also a way to get into the back of the Opel Blitz truck near the Russian spawn point, in order to hide from the opposing team and/or ambush them.