Cassini Images of Saturn Hexagon

I've never heard of this even though Voyager found it over 20 years ago. On Saturn's north pole is a hexagon shape that's 15,000 miles across which could hold 4 earths. Cassini just got a single images of the whole thing.

"It's amazing to see such striking differences on opposite ends of Saturn's poles. At the south pole we have what appears to be a hurricane with a giant eye, and at the north pole of Saturn we have this geometric feature, which is completely different."