Fortified wall, called by Death Runners 'New Berlin Wall', separates the wasteland and ruins of the outskirts from the central part of Neo-Berlin under control of the mutants. Not exactly a place for holidays. That's UAV's final stop, if it's not destroyed earlier by some rogue mutant packs. Once unloaded, most UAVs end up in the moss surrounding the wall or are being used for augmenting the wall itself.
'Reload' is a personal project, a visual development of a post-apocalyptic sci-fi story, suitable for FPS or an action movie. If you are interested and to better understand the concepts, have a look at Timeline of Events and Plot Summary on my blog: http://adamkuczek.blogspot.com/2012/12/reload-project-introduction.html