Just a couple mile past Minneapolis, Kansas you will find Rock City.  It is a bit strange to see all those rock formations in the middle of a field.  Even though they are just big rock formations, you find yourself spending quite a long time looking at them.  Also I had to go and look and each individual one.  They are all similar, but each one has its own distinct character.  The price is 3 dollars, but half of them are located before the gift shop so you can park your car and enjoy them without having to pay.  Also take a lunch and half a picnic!  There are plenty of tables to sit and take in all the scenery! - Royce