Day-41.  Chadron NE to North Platte NE, 235 miles.  At Alliance NE we made a quick stop at a roadside attraction known as Carhenge, consisting of a large circle of old wreck cars sticking out of the ground.  Definitely NOT the 8th wonder of the world.  In North Platte we stopped at an antique mall we had been to previously on the way west to pick up a few more antique bottles that had been dug by a local collector at a variety of frontier forts.  The collector had let us know he had added some more of his finds to his booth at the mall.  From there, we visited the Union Pacific's "Golden Spike" tower overlooking the Bailey classification yard, the largest such railroad yard in the world, 8 miles long and over a mile in width.  Tomorrow we have a long drive to Stuart IA, an intermediate 1-night stopping point en route to Le Claire IA.