Desert sand dunes are constantly shifting. They are unique among landforms in that, despite their size, a gust of wind or a rain shower can completely reshape them in an instant. Dunes aren’t necessarily towering; they can range from several centimeters to over a kilometer in height.

Sand dunes are thus not defined by scale but by their continuous motion and movement. They transform, blend, and envelop one another, never offering a clearly delineated beginning and end. Their folds and curves extend over wide swaths of continents, dwarfing any viewer in both their size and seemingly infinite vastness. Their continual movement give dunes an ethereal