Granted, it is still a niche market. But if the Intergovernmental Panel on Climate Change is to be believed — and why not? — it's a growth opportunity. The traveler in the very near future might be ready for some global-warming tourism. Vacation destinations? You could do the Maldives and watch the sea level rise before your very eyes. Or perhaps a trip to the African Sahel to experience some scary soil evaporation. Or you can do what we did and journey to Icy Bay in Alaska and just watch the world melt.