Hoodoos and Other Fascinating Rocks

We were driving down the road when suddenly off on our left was this strange formation
of rocks that look similar to pictures I've seen of the South Dakota badlands.
This picture does not the depth of this.

Joe overlooking the formations which also contain hoodoos.

This picture shows what hoodoos are...In the middle of the picture is a pile of rocks that
almost look like a mushroom.  Hoodoos are those rocks on top of a column that protects
it from wind and water erosion.  They may eventually fall off.

This interpretive sign was at the location.  Hard to believe that some of these rocks came all the way
from Idaho or Utah.

This was either someone's old abandoned home or an old schoolhouse.