I was being lazy when I typed my initial response. It's definitely a thing, but the nature of the thing depends on what you're looking for. With overseas rotations, most people are either looking to help underserved people in developing countries or to take a 4-week vacation in a tourist destination. Either way, there are lots of options. You could do anything from working at a heroin recovery center in Karachi and risking your life every day on your way to work to rotating at an academic hospital in Sydney and surfing every day after work.