It's not Devil's Tower

 

…but I did make the hike out to Pawnee Buttes.

 

 

The tops of the buttes represent where the surface of the prairie used to be.  The land surrounding the buttes has eroded away exposing fossil bearing rocks 100 million years older than the soil on top.

 

 

The trail there leads over some interesting terrain.

 

 

…and past some interesting characters.