Tethys (Natural Colors; credits: Lunar Explorer Italia)

Caption NASA:"The Terminator between shadow and light cuts across a large crater in the high Southern Latitudes of the moon Tethys.
Also visible near the Terminator on the left of the image is a portion of the Ithaca Chasma, a chasm that runs North-South for more than a 1000 Km (about 620 miles). This view looks toward the South Pole of Tethys, and the Pole lies on the Terminator between the crater and the chasm.
Lit Terrain seen here is mostly on the Trailing Hemisphere of Tethys.

The image was taken in Visible Light with the Cassini Spacecraft narrow-angle camera on Feb. 16, 2009. The view was acquired at a distance of approx. 873.000 Km (such as about 542.000 miles) from Tethys and at a Sun-Tethys-Spacecraft, or Phase, Angle of 96°.
Image scale is roughly 5 Km (a little more than 3 miles) per pixel".