In this month’s cover story, Jimmy ­Kimmel remarks that he has led a “buckety” life (see “The 2016 Bucket List,” page 88). Though this felicitous phrase likely applies to many of our readers, we all have items on our lists of personal goals that remain unfulfilled. One of mine is to travel the world by water. “The traveler is perfect king aboard his boat,” claimed a mid-19th-century guidebook to the Nile, according to David McCullough in Mornings on Horseback, his biography of the young Teddy Roosevelt. T…