Darklight Tower is a fort in The Elder Scrolls V: Skyrim. It is an old ruined watchtower infested with Frostbite Spiders and witches. It is located southwest of Riften, almost at the border of Skyrim, directly south of Goldenglow Estate. This is where the potential follower Illia is located. If her request for help is accepted, the quest "Repentance" will start.