Juxtaposition - Something Old, Something New

Neither shot is noteworthy, but I like the contrast between old and new.  The first one was taken intentionally, the second I only noticed the contrast after the fact.  Revisiting both has sparked my interest in seeking similar things as I look about...

Historic downtown district, Cheyenne, Wyoming...

This was taken at a roadside rest stop on I70 in Kansas, near the Colorado border....