We were taking a walk around the arboretum in Seattle.  It is owned by the University of Washington I think (if not, let me know in the comments) and it is laid out with various areas to spend time if you choose to stop walking for a while.  There is one open-sided building which could be used for a picnic of you were so inclined.  What caught my eye was just how much there was growing on the roof of the structure.  If you were looking down on it, it might be totally camouflaged!