Extreme geographic points include: to the north, Ras Doumera and the point at which the border with Eritrea enters the Red Sea in the Obock Region; to the east, a section of the Red Sea coast north of Ras Bir; to the south, a location on the border with Ethiopia west of the town of As Ela; and to the west, a location on the frontier with Ethiopia immediately east of the Ethiopian town of Afambo.