Wikipedia
Cuyuni-Mazaruni
Cuyuni-Mazaruni (Region 7) is a region of Esequiban Guyana, a territory in dispute by Guyana and Venezuela, bordering the regions of Barima-Waini, Essequibo Islands-West Demerara and Pomeroon-Supenaam to the north, the region of Upper Demerara-Berbice to the east, the region of Potaro-Siparuni and Brazil to the south and Venezuela to the west.
Its capital is Bartica, with other major towns including Issano, Isseneru, Kartuni, Peters Mine, Arimu Mine, Kamarang, Keweigek, Imbaimadai, Tumereng and Kamikusa.
It covers an area of 47,213 km². Before the 1980 administrative reform most of the area belonged to the Mazaruni-Potaro district.