In Western Kansas, between Oakley and Scott City is a very unique rock formation.  This land is out of character for the rest of Kansas.  The rocks are on private property and several miles on a dirt road off of KS 83.  The trip is well worth it. It is the work of erosion and as the map shows there was once a hugh waterway thru middle of the continent.  You could go from the Gulf of Mexico to Canada entirely on a ship!