The Factory is a factory located in Boulogne-Billancourt, France, near Kadic. The Factory was based on an actual factory, the Renault Automobile Factory located in Île Seguin, that was later demolished. It used to be an old car factory, and was used by Franz Hopper as a base of operations in his experiments with Lyoko and Carthage. The Factory is considered to be the Lyoko Warriors's headquarters.
The Factory is located in the middle of the River Seine, on an artificial island. A bridge connects it to the mainland. A manhole on the bridge leads to the Sewers below; typically, the Lyoko Warriors come up through this after traveling through the sewers from Kadic. The Factory can also be reached by boat; as shown when the Lyoko Warriors used a dinghy in Plagued when X.A.N.A. blocked the bridge.
The building itself is occasionally used in X.A.N.A.'s schemes; he most often uses the Factory Floor to make things, or attack our heroes. For example, X.A.N.A. uses the machinery there to make a robot in the episode The Robots.
Factory floor plan
Above the ground floor is the upper level of the factory. This consists of a walkway bordering the inside of the building. The upper level is where the bridge meets the factory, and hence where the characters normally enter; to get down to the ground floor, they swing down on ropes.
Franz Hopper's machinery is located below the main level, and is normally accessed by the lift, although an alternate route, which goes through the boiler room, exists. In The Trap, X.A.N.A. disabled the elevator, forcing Jeremie and Odd to use the route, despite X.A.N.A. rigging the boiler to explode. This path became a plot point in other episodes as well, such as in Replika, when Herb and Nicholas nearly found the factory.
Additionally, there is a room with massive motor equipment with canals, which may have been for cooling systems. This was shown in "Replika" and "Tip-Top Shape".
Directly below the lab is the scanner room, which can also be accessed by a hatch from the lab.
Another map of all the old and a few new locations from Google Maps at:
The Factory is the old Renault Factory location for Seasons 1-4. I have a location of Kadic Academy in Sceaux, France (Seasons 1-4), and the location of Kadic Academy in Angoulême, France (Evolution). Or you can see the map below: