This amazing image was taken by NASA's Cassini space probe, and has been labelled with each of the notable features in view. Not only can we see Saturn and a host of its moons (Enceladus, Epimetheus, Prometheus,Tethys, Janus, Mimas and Pandora), we can also see three of the inner planets: Mars, Venus and our own Earth, under the ring on the lower right.
If you can't make this image out well, I pinched it from io9 which goes into more detail about the process of the image capture, and has a higher-res copy. For the very best experience, though, visit CICLOPS, the Cassini Imaging Central Laboratory, and open up the full-res file. Astonishing.