The Nile River—the world’s longest at ~6,650 km (4,132 mi)—winds through northeastern Africa, touching 11 countries:
They converge near Khartoum, Sudan, forming the main Nile, which flows north through Egypt to the Mediterranean Sea.
The Nile has sustained civilizations for millennia, providing water, agriculture, transport, and hydroelectric power. Today, it remains central to the economies and geopolitics of the Nile Basin nations.