Are you thinking of Juno perhaps? That's not a photo-mission.
Cassini has:
- found "sand" dunes, river channels, mountains, and lakes on Titan
- landed a probe on Titan
- photographed most of Saturn's moons
- discovered gas jets on Enceladus and adjusted the mission to investigate and discovered that they are caused by tidal compression which squeezes out some of the subsurface ocean and forms one of Saturn's faint rings
- discovered and researched how spokes and propellers form in the rings
- documented the shepherding action of the shepherd moons on the rings
- discovered the long-lasting polar hexagon feature
- photographed the rings at equinox, which dramatically shows the vertical displacement of the rings
Cassini is my favorite space mission. It has really changed our view of the solar system and beyond. Some of the most fascinating places are going to be moons of these gas giants.
Cassini has:
- found "sand" dunes, river channels, mountains, and lakes on Titan
- landed a probe on Titan
- photographed most of Saturn's moons
- discovered gas jets on Enceladus and adjusted the mission to investigate and discovered that they are caused by tidal compression which squeezes out some of the subsurface ocean and forms one of Saturn's faint rings
- discovered and researched how spokes and propellers form in the rings
- documented the shepherding action of the shepherd moons on the rings
- discovered the long-lasting polar hexagon feature
- photographed the rings at equinox, which dramatically shows the vertical displacement of the rings
- plus way more
http://saturn.jpl.nasa.gov is a better site. There is a record of some of the top findings at https://saturn.jpl.nasa.gov/galleries/hall-of-fame/