We did not make much of an effort to find sites (other than for gas and food) at which to stop for Colorado and Kansas.
I found Colorado's landscape refreshing after the barrenness of most of the other states.
We saw a brick road in Kansas although of red brick. I think that building is of the yellow sandstone that probably inspired The Yellow Brick Road.
Away in the distance is Fort Riley; we heard artillery go off and saw the smoke from this lookout.