Just travel, with a small laptop (for support). You'll be able to live for over a year on that money in places like New Zealand, China, India, etc etc.
Or rent/buy a small RV and see rural America!
Why rural america? I've driven through my fair share of it and lived in it for a long time, and based on this heuristic I've got to say that you will mostly just be seeing large expanses of farm fields.
With the kind of money he has: Costa Rica, South of France, Tahiti, [insert sunny place]. Mojito Island