Select a region of Guyana Guyana mostly consists of rolling highlands with a low coastal plain and savannah in the south. The highest point is Mount Roraima at 2,835 m. Regions of Guyana Barima-Waini Pomeroon-Supenaam Essequibo Islands-West Demerara Demerara-Mahaica Mahaica-Berbice East Berbice-Corentyne Cuyuni-Mazaruni Potaro-Siparuni Upper Takutu-Upper Esequibo Upper Demerara-Berbice