A WINTER WALK IN WIMBERLEY

I found a couple of startling new additions when I went to walk the Wimberley hike & bike trail this week, for the first time in a couple of months.  What were they?  The sight, and sound, of rushing water!

There were new little streams and waterfalls all over the place!  I also spotted quite a few of these things...

little piles of stones, obviously arranged by human hands.  I seem to remember learning something about them -- I believe they were called cairns -- as a wee Girl Scout.  I think we even constructed a few ourselves, and they were meant to be landmarks or to convey some message to hikers or travelers who came after us.  So.  What do you suppose these cairns were trying to tell me?