The San Juan River has carved deep, improbably curvy meanders into the Utah desert landscape, in a formation known as the Goosenecks. These loops, cut into the rock, offer a striking example of how a watercourse can carve a narrow, winding canyon over millions of years.

NASA's image makes it possible to observe the geometry of these meanders from the air, appreciating the width of the curves and the depth of the canyon. Fluvial erosion has sculpted the desert terrain, exposing this network of meanders.