Greater Chittagong consists of the south easternmost parts of Bangladesh, with a total population of over 28 million. No Bangladesh itinerary can be complete without a trip to this region. It comprises Chittagong city (the second-largest city in Bangladesh), Chittagong Hill Tracts and other neighbouring districts, including Cox's Bazar. Dhaka to Chittagong city is about a 5-hour drive or a 6-hour bus/train ride. Frequent flight options between the two cities also exist. If travelling by land, leave early in the morning in order to arrive in Chittagong city in time for a late lunch.