The Mountain Cabin has only appeared in Aelita's memories, dreams and visions. It appears that it was the home of Franz Hopper, Aelita, and Antea before he and Aelita moved to the Hermitage. This was also the place when Aelita's mother vanished as shown in a dream in Distant Memory. It is unknown where the cabin is located although it is possible that it could be located within the French Alps as it in enclosed by trees and nearby mountains. The other Lyoko Warriors never visit the cabin nor make any mention of it.