Geography
The Role of Groundwater in Shaping Arid Landscapes
Quick fact
In the Sahara and other arid lands, groundwater creates vast cave systems and causes sudden sinkholes that reshape the surface within minutes.
Why this is interesting
Deserts are known for endless sand and scorching sun, but did you know that much of their dramatic landscape is carved by water flowing hidden underground? How can a place that rarely sees rain be shaped by water?