I just watched the last seven minutes of Cassini before it plunged into Saturn's atmosphere at more than 77,000 miles an hour. The pictures it sent back over the last thirteen years plus what the Huygens probe discovered on Titan have to be some of the most spectacular views of the Saturnian system. Not taking anything away from Juno at Jupiter or New Horizons as it flew past Pluto but Cassini in my opinion tops them all. Thirteen years at Saturn! Absolutely incredible.