Human: Make a concise location description of a mysterious scene outside a farmland field with head-sized stones. Assistant: 
The sea of tall grass that extends as far as the eye can see to the north and east ends in a wooded hillside that slopes down into a vegetation-choked valley. A few head-sized stones have been set at the edge of the woods in an oddly unnatural pattern, as if placed there to leave some unknown message or to mark the way.