Interesting, just checking the log file reveals I've built every wonder out there... except the Great Lighthouse.
Does anyone actually build that?
That was the second last wonder (not counting DLC wonders) that I built (had more to do with higher AI priority to build than mine than the usefulness since I play on water maps). The very last one I built was Great Wall.
There's two DLC wonders I've not yet built: Temple of Artemis [AI starts with the tech for that so they beat me at my latest attempt again; I just got out the time machine to make a different decision] & Statue of Zeus [I've not even tried to build that]