Here is a natural color photograph of Rhea
. Since the same side of Rhea always faces Saturn, one hemisphere always leads as the moon orbits, and the other trails. This image shows the trailing edge.
It has bright, wispy terrain that is similar in appearance to that of Dione, another one of Saturn's moon. At this distance however, the exact nature of these wispy features is out of the reach of Cassini's cameras.
An enlarged image
shows the wispy features better. This terrain is made of bright ice cliffs created by tectonic fractures. (Tectonic fracturing is caused by violent internal activity in the moon.)