You’re young, in good shape, and you don’t have kids yet—really, there’s no better time to travel than now. So that’s why we scoped out the world’s best adventure trips to compile this top-20 list for guys just like you. Truth be told, some of these excursions are intense, demanding advance training, special gear, technical skills, a fat wallet, and a work sabbatical. But others, you’ll be pleased to find, require only a plane ticket, a minimal budget, and a little bit of white space on your calendar. Take your pick.