When I went to London for the second time ten years ago (after graduating high school), the Eye had been built by then. It was pretty awesome - the trip consisted of tours of various places in England, Scotland, and Ireland.
Other than that and one trip to Mexico, I haven't been out of the country since. I'm not much of a traveler, but if I were to plan a trip now, I would definitely go back to England and do some sort of lit nerd tour :)