The continent that has both the longest river and the largest desert is Africa. The Nile River, stretching over 6,650 kilometers, is often cited as the longest river in the world. Additionally, the Sahara Desert occupies a vast portion of Northern Africa, encompassing over 9 million square kilometers. Africa's diverse geography includes a wide range of ecosystems, climates, and cultures, making it a continent of significant ecological and human interest. This unique combination of geographical features greatly influences the climate, agriculture, and population distribution across the continent.