I had known of the Sahara Desert since I was a kid, the largest hot desert in the world is hard to forget as it covers nearly all of northern Africa (8,600,000 square km). Despite being known for its dry air and hot dunes, the desert changes into a tropical oasis every 20,000 years.

An Unforgettable Weekend in the Sahara Desert
Sunset in Moroccan Sahara desert. Photo credit: Mursal Habibzai/ Morocco World News