This region with 15 to 20 km from west to east and with 40 km from north to south, contains several valleys where lakes and lagoons have been formed and often surrounded with hills and sand dunes.
The seaside is occupied by long beaches and some creeks, with an exception in the North with the Tabatinga cliffs.
The important population density is mainly due to the nearness of Natal and the human concentration in important cities such as 'Parnamirim' and 'São José do Mipibu'.
