Antarctica is next. Probably.
It’s going to be a tough one. There’s a surprising amount of people who actually want to live there, so getting a job is pretty competitive. And you do have to get a job; the only reason it’s even inhabited is because of the research bases, so if you’re not doing research or part of the support staff, you can’t just hang out there.
I imagine the title of a book about a year in Antarctica will be something like WTF Was I Thinking?