Let's see...
1) Go to Hawaii and explore.
2) Go to The Netherlands. Meet my long lost relatives and, of course, explore.
This is hard. I never thought much about it...
3)Like Dlish, I would love to see my son grow up. To see what he will became. To see the life he helps bring into this world.
4)Go swimming with dolphins. As corny as it sounds, I think it would be a great experience. Dolphins are such smart, respectable creatures.
5)Work behind the scenes at a zoo or wildlife center of some sort, preferably with the elephants.
I think that's it for now.