It is impossible to cross the Great Plains without seeing scores of center-pivot irrigation rigs, each tending a circular or semicircular field. Here, two of them guard Route 6 in a storm just east of the Colorado-Nebraska state line. (April 2005 photo)

Colorado - Nebraska Border
	Crossing the Great Plains on Route 6 is a fantastic experience. Only a few widely spaced small towns interrupt wide-open spaces and incredible vistas. (May 2000 photo)
It is impossible to cross the Great Plains without seeing scores of center-pivot irrigation rigs, each tending a circular or semicircular field. Here, two of them guard Route 6 in a storm just east of the Colorado-Nebraska state line. (April 2005 photo)