Watching a sunrise over the wide-open plains of the Serengeti is one of those ‘pinch me’ moments, and on this nine-day, it won’t be the only one. Beginning in Nairobi, take a trip into the countryside to Mto wa Mbu, get a safari fix in the Serengeti and Ngorongoro Crater, change up the altitude with walks around the Usambara Mountains and ferry to Zanzibar’s white-sand beaches and intriguing Old T...