When I was a kid, we had sprinklers to jump  through.  Now there are water parks everywhere.  This one is bit unusual  in that it is simply a large concrete area with fountains spinkling  water from the perimeter.  It seems to be a kind of amphitheatre with  tiered concrete benches surrounding it, but the performers and audience  would be soaked.  Makes a nice visual for the patrons of the Mill  though.