Does it count if you wanted to accomplish something, like going to Beirut in 1983 and not letting Dad go to the Embassy till after lunch when the bomb had already gone off? Or is that a separate thread?

In case it is, hmmm... back in the 60's in post-colonial Africa was great, I'd like to be back there but at the age I am now, or, say, a decade younger; I'd miss going to Friday's After 5 here in Charlottesville, the outdoor weekly live concert, but then again I'd get a lot more African music in, when I was a teen we kinda listened to French Disco. If it can be somewhere I've never been, well, I'd have to think long and hard on that...
On the other hand, if it can be somewhere that hasn't existed yet, I'd like to visit Niven's Known Space universe! Now THAT would be a fun time!