Well, just looking briefly at your board I'd say...
Your military strength is great. Let you attack anyone, when you needed or wanted. Not sure exactly when and for how long you had this strength (I don't remember you being notably ahead of me earlier on), so this might have just been something you leveraged late with Air Force
Your late culture production is pretty good. 6 buildings producing 3 culture each. Again, I don't know how long you had most of these - but I suspect your culture production was pretty good throughout age III.
You managed to get a ton of good culture builds on a low rock production. That's quite impressive.
Very powerful Wonder for the buildings you had, synergised very well to give big wads of points.
You had some good Impacts seeded, and were in a position to score well from many of them.
Of course, how you managed to reach those good positions is entirely a different matter, but... those are my first thoughts.