In general, hexagons are very cool.

Giant hexagons from Saturn are beyond cool.
 

The Cassini spacecraft has returned the best images yet of the
strange hexagonal jet stream that flows around the northern pole of
Saturn.

First discovered by the Voyager spacecraft in the early 1980s, the
hexagon remains a beautiful mystery to astronomers, and one they’ve
been waiting for another shot to see for almost three decades. –Wired