I would love to time travel.
Assuming that I could go absolutely anywhere at anytime, and I was practically invisible to everyone else. There would be a tone of places to go. First I would visit Pearl Harbor, when it was being attacked by the Japanese. Of course I wouldn't be anywhere to dangerous. I would also have to show up at Normandy on D-Day, and on the Missouri to see Hirohito surrender to Nimitz. And then the criminal trial at Nuremburg.
Aside from WWII, I would go to FDR's, and JFK's inaugurations. Be pretty interesting to see them, I would have to see Winston Churchill at some point in his time as PM of the Britain. I would go see Hitler, at the Nuremburg rallies. I've always wondered what he sounded like. I'd see Lincoln and Kennedy's assassinations, maybe the Hinkley attempt on Regain too. I think going to the UN during the Cuban Missile crisis, and to finish off world events I'd go to Berlin, when the wall fell.
Personally I'd visit my grandparent's wedding. I'd also like to see my grandfather when he was in the Italian carribaneri, right before the world, (he left in September 1939 to come to the US). I also think it would be interesting to see my birth, wonder what that looked like?
Screw an Alaskan cruise, this would be my ultimate vacation. I'd have to bring a lot of film, and a damn good map.