You are torn between two travel experiences which are unlike any others. We have been lucky enough to have been to the Antarctic twice and will be returning to Africa next year for our ninth visit. The ultimate answer is to do both! But, which first? I would suggest the Antarctic for very pragmatic reasons - it is more physically demanding than Africa, so do it now while the old body (my old body, not yours!) is up to it. Getting dressed for going ashore is a chore all by itself, add to that the Zodiac landings, climbing steep hills, a possible rough crossing of Drake's Passage and you have some demands, but with spectacular wildlife and landscape rewards. The next year, go to Africa! Having said all that, if the question is: You have one more trip to take, where would it be? Africa! IMHO.

Ted

PS We're also thinking about returning to the Antarctic - The Hanseatic looks pretty good.