The AU where Oliver, Barry, and Kara survive Lian Yu together for years, raising a baby Kal-El, and are eventually rescued – by the League of Assassins. (Note: This version is unedited. For main, edited version, go to AO3)
Oliver finally takes that weekend visit to Central City. Or, more specifically, to visit Barry Allen, hot CSI. (Alternate Universe - Alt Arrow Season 2 & Alt Pre-Series Flash)