The landscape of Sudan consists mainly of flat plains punctuated by several mountain ranges.
The Marrah Mountains, which contain the highest point of the country, Deriba Caldera at 9,980 ft (3,042 m), are located on the western edge of the country, and the Red Sea Hills are located on the northeastern edge.
The Deriba Caldera (Deriba Crater) is located in Darfur, and became the highest point of Sudan after South Sudan achieved independence from the country. The crater measures between 3-4 miles (5-8 km) in diameter from the outer edges, and is filled with water.
The Dinder and Rahad Rivers are tributaries of the Blue Nile - whose course winds through Sudan at a length of nearly 497 miles (800 km). Within the country, the White Nile contains no significant tributaries.
The lowest point of the country is the Red Sea (0 m).
Deriba Caldera, Sudan