Epimetheus, from about 37.000 Km (enhanced - but natural - colors; credits: NASA)

Caption NASA:"The Cassini spacecraft's close flyby of Epimetheus in December 2007 returned detailed images of the moon's South Polar Region.
The view shows what might be the remains of a large impact crater covering most of this face, and which could be responsible for the somewhat flattened shape of the Southern part of Epimetheus (116 Km, or about 72 miles across) seen previously at much lower resolution.
The image also shows two terrain types: darker, smoother areas, and brighter, slightly more yellowish, fractured terrain. One interpretation of this image is that the darker material evidently moves down slopes, and probably has a lower ice content than the brighter material, which appears more like "bedrock". Nonetheless, materials in both terrains are likely to be rich in water ice. (...)".