I personally rank them among the most beautiful places I've ever been.
Whenever I head to the Colorado Rockies from NW Iowa, travelling through the Sandhills is an option I often take. They have a unique beauty and one finds a place where you really feel apart from the world. This week, the Nebraska Star Party is going on in the Sandhills. The skys are claimed to be some of the darkest to be found for astronomy. Those who love to camp should check out the Nebraska National forest -- all man-planted at Halsey. Also, some wonderful canoeing on various rivers.
I hope to see them someday.....