Rwanda, in east-central Africa, is surrounded by the Democratic Republic of the Congo, Uganda, Tanzania, and Burundi. It is slightly smaller than Maryland. Steep mountains and deep valleys cover most of the country. Lake Kivu in the northwest, at an altitude of 4,829 ft (1,472 m), is the highest lake in Africa. Extending north of it are the Virunga Mountains, which include the volcano Karisimbi (14,187 ft; 4,324 m), Rwanda’s highest point.