The city is situated at the confluence of the three large rivers Myu, Koladaing and Lemyu, and is the most flourishing city in the Arakan division.
The central part of the district consists of three fertile valleys, watered by the Myu, Koladaing and Lemyu.
The four chief towns are Khumgchu in the extreme north-east of the district; Koladaing in the centre; Arakan, farther down the rivers; and Akyab on the coast, where their mouths converge.
The principal rivers of Arakan are - (1) the Naaf estuary, in the north, which forms the boundary between the division and Chittagong; (2) the Myu river, an arm of the sea, running a course almost parallel with the coast for about 50 m.; (3) the Koladaing river, rising near the Blue mountain, in the extreme north-east, and falling into the Bay of Bengal a few miles south of the Myu river, navigable by vessels of from 300 to 400 tons burden for a distance 01 40 m.
The old city of Arakan, formerly the capital of the province, is situated on an inferior branch of the Koladaing river.