Board Thread:Lore Discussion/@comment-24.149.127.9-20150901125029/@comment-6881629-20150901130940

I think thats the main point of the basic spider to repair, you can sometimes see them (at least looking like their) working on caved in tunnels and broken pipes maybe they can repair other automatons too. There could also be automated constitution plants hidden away constantly churning the things out, all just guesses though. Boring answer is it's the area set refreshing the dungeon.

ESO is made by different people to the numbered games and all the games do have a slightly different look to the others.