Two weeks before mission's end, Cassini took its final photos documenting the activity of Enceladus' south polar plumes. This photo was taken with the wide-angle camera from the night sides of Saturn and Enceladus and the unlit face of the rings. Enceladus is beyond Saturn as seen from Cassini, its nightside lit by light reflected off of Saturn. The photo has been edited to remove effects of internal reflections within the camera and composited with a narrow-angle image of Enceladus to make the plumes more visible.
And here's a zoom in to the narrow-angle camera view.
NASA / JPL-Caltech / SSI / Emily Lakdawalla
A last look at Enceladus' plumes
A composite of two Cassini narrow-angle camera images of Enceladus, part of the last observations of Enceladus' plumes before the end of the Cassini mission. The two images were taken on 27 and 28 August 2017. The moon is lit nearly from behind; its nightside is illuminated by sunlight that first reflected off of Saturn. Two images were composited in order to make the plumes more visible, and image blemishes have been painted out.